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Finding the Fourth Proportional to 138,465.92, 207,700.55 and 38,620.04

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Solution

The fourth proportional to 138,465.92, 207,700.55 and 38,620.04 is: 57,930.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,465.92 : 207,700.55 = 38,620.04 : x
  2. Step 2: Convert to fraction form
    138,465.92/207,700.55 = 38,620.04/x
  3. Step 3: Cross multiply
    138,465.92x = 207,700.55 × 38,620.04
  4. Step 4: Simplify right side
    138,465.92x = 8,021,403,549.02
  5. Step 5: Solve for x
    x = 8,021,403,549.02/138,465.92
  6. Step 6: Final answer
    x = 57,930.53

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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.