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Finding the Fourth Proportional to 136,562.87, 188,456.88 and 76,132.31

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Solution

The fourth proportional to 136,562.87, 188,456.88 and 76,132.31 is: 105,062.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,562.87 : 188,456.88 = 76,132.31 : x
  2. Step 2: Convert to fraction form
    136,562.87/188,456.88 = 76,132.31/x
  3. Step 3: Cross multiply
    136,562.87x = 188,456.88 × 76,132.31
  4. Step 4: Simplify right side
    136,562.87x = 14,347,656,953.00
  5. Step 5: Solve for x
    x = 14,347,656,953.00/136,562.87
  6. Step 6: Final answer
    x = 105,062.65

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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.