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Finding the Fourth Proportional to 78,116.94, 117,508.01 and 70,809.63

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Solution

The fourth proportional to 78,116.94, 117,508.01 and 70,809.63 is: 106,515.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,116.94 : 117,508.01 = 70,809.63 : x
  2. Step 2: Convert to fraction form
    78,116.94/117,508.01 = 70,809.63/x
  3. Step 3: Cross multiply
    78,116.94x = 117,508.01 × 70,809.63
  4. Step 4: Simplify right side
    78,116.94x = 8,320,698,710.14
  5. Step 5: Solve for x
    x = 8,320,698,710.14/78,116.94
  6. Step 6: Final answer
    x = 106,515.94

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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.