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Finding the Fourth Proportional to 72,937.78, 100,654.17 and 39,403.78

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Solution

The fourth proportional to 72,937.78, 100,654.17 and 39,403.78 is: 54,377.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,937.78 : 100,654.17 = 39,403.78 : x
  2. Step 2: Convert to fraction form
    72,937.78/100,654.17 = 39,403.78/x
  3. Step 3: Cross multiply
    72,937.78x = 100,654.17 × 39,403.78
  4. Step 4: Simplify right side
    72,937.78x = 3,966,154,770.76
  5. Step 5: Solve for x
    x = 3,966,154,770.76/72,937.78
  6. Step 6: Final answer
    x = 54,377.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.