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Finding the Fourth Proportional to 71,805.87, 99,089.82 and 39,973.17

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Solution

The fourth proportional to 71,805.87, 99,089.82 and 39,973.17 is: 55,161.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,805.87 : 99,089.82 = 39,973.17 : x
  2. Step 2: Convert to fraction form
    71,805.87/99,089.82 = 39,973.17/x
  3. Step 3: Cross multiply
    71,805.87x = 99,089.82 × 39,973.17
  4. Step 4: Simplify right side
    71,805.87x = 3,960,934,220.13
  5. Step 5: Solve for x
    x = 3,960,934,220.13/71,805.87
  6. Step 6: Final answer
    x = 55,161.71

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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.