Home / 129,425.52-194,138.42-40,686.78

Finding the Fourth Proportional to 129,425.52, 194,138.42 and 40,686.78

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Solution

The fourth proportional to 129,425.52, 194,138.42 and 40,686.78 is: 61,030.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,425.52 : 194,138.42 = 40,686.78 : x
  2. Step 2: Convert to fraction form
    129,425.52/194,138.42 = 40,686.78/x
  3. Step 3: Cross multiply
    129,425.52x = 194,138.42 × 40,686.78
  4. Step 4: Simplify right side
    129,425.52x = 7,898,866,980.65
  5. Step 5: Solve for x
    x = 7,898,866,980.65/129,425.52
  6. Step 6: Final answer
    x = 61,030.21

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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.