Home / 129,828.80-194,354.40-77,211.20

Finding the Fourth Proportional to 129,828.80, 194,354.40 and 77,211.20

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Solution

The fourth proportional to 129,828.80, 194,354.40 and 77,211.20 is: 115,585.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,828.80 : 194,354.40 = 77,211.20 : x
  2. Step 2: Convert to fraction form
    129,828.80/194,354.40 = 77,211.20/x
  3. Step 3: Cross multiply
    129,828.80x = 194,354.40 × 77,211.20
  4. Step 4: Simplify right side
    129,828.80x = 15,006,336,449.28
  5. Step 5: Solve for x
    x = 15,006,336,449.28/129,828.80
  6. Step 6: Final answer
    x = 115,585.57

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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.