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Finding the Fourth Proportional to 136,930.32, 188,893.08 and 86,658.48

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Solution

The fourth proportional to 136,930.32, 188,893.08 and 86,658.48 is: 119,543.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,930.32 : 188,893.08 = 86,658.48 : x
  2. Step 2: Convert to fraction form
    136,930.32/188,893.08 = 86,658.48/x
  3. Step 3: Cross multiply
    136,930.32x = 188,893.08 × 86,658.48
  4. Step 4: Simplify right side
    136,930.32x = 16,369,187,195.32
  5. Step 5: Solve for x
    x = 16,369,187,195.32/136,930.32
  6. Step 6: Final answer
    x = 119,543.92

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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.