Home / 137,121.28-189,226.82-76,691.68

Finding the Fourth Proportional to 137,121.28, 189,226.82 and 76,691.68

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Solution

The fourth proportional to 137,121.28, 189,226.82 and 76,691.68 is: 105,834.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,121.28 : 189,226.82 = 76,691.68 : x
  2. Step 2: Convert to fraction form
    137,121.28/189,226.82 = 76,691.68/x
  3. Step 3: Cross multiply
    137,121.28x = 189,226.82 × 76,691.68
  4. Step 4: Simplify right side
    137,121.28x = 14,512,122,726.86
  5. Step 5: Solve for x
    x = 14,512,122,726.86/137,121.28
  6. Step 6: Final answer
    x = 105,834.21

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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.