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Finding the Fourth Proportional to 99,553.90, 137,384.38 and 54,841.90

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Solution

The fourth proportional to 99,553.90, 137,384.38 and 54,841.90 is: 75,681.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,553.90 : 137,384.38 = 54,841.90 : x
  2. Step 2: Convert to fraction form
    99,553.90/137,384.38 = 54,841.90/x
  3. Step 3: Cross multiply
    99,553.90x = 137,384.38 × 54,841.90
  4. Step 4: Simplify right side
    99,553.90x = 7,534,420,429.52
  5. Step 5: Solve for x
    x = 7,534,420,429.52/99,553.90
  6. Step 6: Final answer
    x = 75,681.82

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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.