Home / 129,712.28-194,373.94-100,085.72

Finding the Fourth Proportional to 129,712.28, 194,373.94 and 100,085.72

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Solution

The fourth proportional to 129,712.28, 194,373.94 and 100,085.72 is: 149,978.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,712.28 : 194,373.94 = 100,085.72 : x
  2. Step 2: Convert to fraction form
    129,712.28/194,373.94 = 100,085.72/x
  3. Step 3: Cross multiply
    129,712.28x = 194,373.94 × 100,085.72
  4. Step 4: Simplify right side
    129,712.28x = 19,454,055,734.14
  5. Step 5: Solve for x
    x = 19,454,055,734.14/129,712.28
  6. Step 6: Final answer
    x = 149,978.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.