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Finding the Fourth Proportional to 99,660.98, 137,532.80 and 54,339.71

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Solution

The fourth proportional to 99,660.98, 137,532.80 and 54,339.71 is: 74,989.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,660.98 : 137,532.80 = 54,339.71 : x
  2. Step 2: Convert to fraction form
    99,660.98/137,532.80 = 54,339.71/x
  3. Step 3: Cross multiply
    99,660.98x = 137,532.80 × 54,339.71
  4. Step 4: Simplify right side
    99,660.98x = 7,473,491,508.13
  5. Step 5: Solve for x
    x = 7,473,491,508.13/99,660.98
  6. Step 6: Final answer
    x = 74,989.15

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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.