Home / 129,540.10-194,310.15-74,141.70

Finding the Fourth Proportional to 129,540.10, 194,310.15 and 74,141.70

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Solution

The fourth proportional to 129,540.10, 194,310.15 and 74,141.70 is: 111,212.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,540.10 : 194,310.15 = 74,141.70 : x
  2. Step 2: Convert to fraction form
    129,540.10/194,310.15 = 74,141.70/x
  3. Step 3: Cross multiply
    129,540.10x = 194,310.15 × 74,141.70
  4. Step 4: Simplify right side
    129,540.10x = 14,406,484,848.26
  5. Step 5: Solve for x
    x = 14,406,484,848.26/129,540.10
  6. Step 6: Final answer
    x = 111,212.55

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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.