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Finding the Fourth Proportional to 99,930.96, 137,891.45 and 64,169.42

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Solution

The fourth proportional to 99,930.96, 137,891.45 and 64,169.42 is: 88,545.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,930.96 : 137,891.45 = 64,169.42 : x
  2. Step 2: Convert to fraction form
    99,930.96/137,891.45 = 64,169.42/x
  3. Step 3: Cross multiply
    99,930.96x = 137,891.45 × 64,169.42
  4. Step 4: Simplify right side
    99,930.96x = 8,848,413,840.43
  5. Step 5: Solve for x
    x = 8,848,413,840.43/99,930.96
  6. Step 6: Final answer
    x = 88,545.27

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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.