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Finding the Fourth Proportional to 71,774.28, 99,053.16 and 39,943.08

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Solution

The fourth proportional to 71,774.28, 99,053.16 and 39,943.08 is: 55,124.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,774.28 : 99,053.16 = 39,943.08 : x
  2. Step 2: Convert to fraction form
    71,774.28/99,053.16 = 39,943.08/x
  3. Step 3: Cross multiply
    71,774.28x = 99,053.16 × 39,943.08
  4. Step 4: Simplify right side
    71,774.28x = 3,956,488,294.13
  5. Step 5: Solve for x
    x = 3,956,488,294.13/71,774.28
  6. Step 6: Final answer
    x = 55,124.04

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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.