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Finding the Fourth Proportional to 99,387.88, 137,155.88 and 54,066.28

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Solution

The fourth proportional to 99,387.88, 137,155.88 and 54,066.28 is: 74,611.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,387.88 : 137,155.88 = 54,066.28 : x
  2. Step 2: Convert to fraction form
    99,387.88/137,155.88 = 54,066.28/x
  3. Step 3: Cross multiply
    99,387.88x = 137,155.88 × 54,066.28
  4. Step 4: Simplify right side
    99,387.88x = 7,415,508,211.73
  5. Step 5: Solve for x
    x = 7,415,508,211.73/99,387.88
  6. Step 6: Final answer
    x = 74,611.80

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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.