Home / 129,287.28-178,422.24-107,740.98

Finding the Fourth Proportional to 129,287.28, 178,422.24 and 107,740.98

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Solution

The fourth proportional to 129,287.28, 178,422.24 and 107,740.98 is: 148,687.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,287.28 : 178,422.24 = 107,740.98 : x
  2. Step 2: Convert to fraction form
    129,287.28/178,422.24 = 107,740.98/x
  3. Step 3: Cross multiply
    129,287.28x = 178,422.24 × 107,740.98
  4. Step 4: Simplify right side
    129,287.28x = 19,223,385,984.55
  5. Step 5: Solve for x
    x = 19,223,385,984.55/129,287.28
  6. Step 6: Final answer
    x = 148,687.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.