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Finding the Fourth Proportional to 78,633,176.70, 117,949,765.05 and 70,980,426.30

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Solution

The fourth proportional to 78,633,176.70, 117,949,765.05 and 70,980,426.30 is: 106,470,639.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,633,176.70 : 117,949,765.05 = 70,980,426.30 : x
  2. Step 2: Convert to fraction form
    78,633,176.70/117,949,765.05 = 70,980,426.30/x
  3. Step 3: Cross multiply
    78,633,176.70x = 117,949,765.05 × 70,980,426.30
  4. Step 4: Simplify right side
    78,633,176.70x = 8,372,124,605,233,840
  5. Step 5: Solve for x
    x = 8,372,124,605,233,840/78,633,176.70
  6. Step 6: Final answer
    x = 106,470,639.45

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.