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Finding the Fourth Proportional to 98,117.70, 147,176.55 and 69,978.30

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Solution

The fourth proportional to 98,117.70, 147,176.55 and 69,978.30 is: 104,967.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,117.70 : 147,176.55 = 69,978.30 : x
  2. Step 2: Convert to fraction form
    98,117.70/147,176.55 = 69,978.30/x
  3. Step 3: Cross multiply
    98,117.70x = 147,176.55 × 69,978.30
  4. Step 4: Simplify right side
    98,117.70x = 10,299,164,768.87
  5. Step 5: Solve for x
    x = 10,299,164,768.87/98,117.70
  6. Step 6: Final answer
    x = 104,967.45

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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.