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Finding the Fourth Proportional to 71,781.74, 99,057.81 and 39,950.65

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Solution

The fourth proportional to 71,781.74, 99,057.81 and 39,950.65 is: 55,131.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,781.74 : 99,057.81 = 39,950.65 : x
  2. Step 2: Convert to fraction form
    71,781.74/99,057.81 = 39,950.65/x
  3. Step 3: Cross multiply
    71,781.74x = 99,057.81 × 39,950.65
  4. Step 4: Simplify right side
    71,781.74x = 3,957,423,897.08
  5. Step 5: Solve for x
    x = 3,957,423,897.08/71,781.74
  6. Step 6: Final answer
    x = 55,131.35

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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.