Home / 129,257.28-178,353.21-71,889.06

Finding the Fourth Proportional to 129,257.28, 178,353.21 and 71,889.06

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Solution

The fourth proportional to 129,257.28, 178,353.21 and 71,889.06 is: 99,194.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,257.28 : 178,353.21 = 71,889.06 : x
  2. Step 2: Convert to fraction form
    129,257.28/178,353.21 = 71,889.06/x
  3. Step 3: Cross multiply
    129,257.28x = 178,353.21 × 71,889.06
  4. Step 4: Simplify right side
    129,257.28x = 12,821,644,614.88
  5. Step 5: Solve for x
    x = 12,821,644,614.88/129,257.28
  6. Step 6: Final answer
    x = 99,194.76

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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.