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Finding the Fourth Proportional to 99,603.71, 137,453.12 and 54,891.71

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Solution

The fourth proportional to 99,603.71, 137,453.12 and 54,891.71 is: 75,750.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,603.71 : 137,453.12 = 54,891.71 : x
  2. Step 2: Convert to fraction form
    99,603.71/137,453.12 = 54,891.71/x
  3. Step 3: Cross multiply
    99,603.71x = 137,453.12 × 54,891.71
  4. Step 4: Simplify right side
    99,603.71x = 7,545,035,839.91
  5. Step 5: Solve for x
    x = 7,545,035,839.91/99,603.71
  6. Step 6: Final answer
    x = 75,750.55

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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.