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Finding the Fourth Proportional to 99,801.60, 137,727.80 and 54,479.97

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Solution

The fourth proportional to 99,801.60, 137,727.80 and 54,479.97 is: 75,183.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,801.60 : 137,727.80 = 54,479.97 : x
  2. Step 2: Convert to fraction form
    99,801.60/137,727.80 = 54,479.97/x
  3. Step 3: Cross multiply
    99,801.60x = 137,727.80 × 54,479.97
  4. Step 4: Simplify right side
    99,801.60x = 7,503,406,139.77
  5. Step 5: Solve for x
    x = 7,503,406,139.77/99,801.60
  6. Step 6: Final answer
    x = 75,183.22

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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.