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Finding the Fourth Proportional to 136,118.56, 187,851.72 and 75,689.68

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Solution

The fourth proportional to 136,118.56, 187,851.72 and 75,689.68 is: 104,456.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,118.56 : 187,851.72 = 75,689.68 : x
  2. Step 2: Convert to fraction form
    136,118.56/187,851.72 = 75,689.68/x
  3. Step 3: Cross multiply
    136,118.56x = 187,851.72 × 75,689.68
  4. Step 4: Simplify right side
    136,118.56x = 14,218,436,574.25
  5. Step 5: Solve for x
    x = 14,218,436,574.25/136,118.56
  6. Step 6: Final answer
    x = 104,456.27

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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.