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Finding the Fourth Proportional to 71,392, 98,523.12 and 39,557.92

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Solution

The fourth proportional to 71,392, 98,523.12 and 39,557.92 is: 54,591.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,392 : 98,523.12 = 39,557.92 : x
  2. Step 2: Convert to fraction form
    71,392/98,523.12 = 39,557.92/x
  3. Step 3: Cross multiply
    71,392x = 98,523.12 × 39,557.92
  4. Step 4: Simplify right side
    71,392x = 3,897,369,699.11
  5. Step 5: Solve for x
    x = 3,897,369,699.11/71,392
  6. Step 6: Final answer
    x = 54,591.13

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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.