Home / 129,921.50-194,319.30-76,486.16

Finding the Fourth Proportional to 129,921.50, 194,319.30 and 76,486.16

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Solution

The fourth proportional to 129,921.50, 194,319.30 and 76,486.16 is: 114,397.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,921.50 : 194,319.30 = 76,486.16 : x
  2. Step 2: Convert to fraction form
    129,921.50/194,319.30 = 76,486.16/x
  3. Step 3: Cross multiply
    129,921.50x = 194,319.30 × 76,486.16
  4. Step 4: Simplify right side
    129,921.50x = 14,862,737,070.89
  5. Step 5: Solve for x
    x = 14,862,737,070.89/129,921.50
  6. Step 6: Final answer
    x = 114,397.83

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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.