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Finding the Fourth Proportional to 71,934.81, 99,347.49 and 54,755.79

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Solution

The fourth proportional to 71,934.81, 99,347.49 and 54,755.79 is: 75,621.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,934.81 : 99,347.49 = 54,755.79 : x
  2. Step 2: Convert to fraction form
    71,934.81/99,347.49 = 54,755.79/x
  3. Step 3: Cross multiply
    71,934.81x = 99,347.49 × 54,755.79
  4. Step 4: Simplify right side
    71,934.81x = 5,439,850,299.47
  5. Step 5: Solve for x
    x = 5,439,850,299.47/71,934.81
  6. Step 6: Final answer
    x = 75,621.95

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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.