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Finding the Fourth Proportional to 136,169.91, 187,891.70 and 75,732.57

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Solution

The fourth proportional to 136,169.91, 187,891.70 and 75,732.57 is: 104,498.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,169.91 : 187,891.70 = 75,732.57 : x
  2. Step 2: Convert to fraction form
    136,169.91/187,891.70 = 75,732.57/x
  3. Step 3: Cross multiply
    136,169.91x = 187,891.70 × 75,732.57
  4. Step 4: Simplify right side
    136,169.91x = 14,229,520,944.01
  5. Step 5: Solve for x
    x = 14,229,520,944.01/136,169.91
  6. Step 6: Final answer
    x = 104,498.28

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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.