Home / 129,134.88-178,210.72-71,775.36

Finding the Fourth Proportional to 129,134.88, 178,210.72 and 71,775.36

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Solution

The fourth proportional to 129,134.88, 178,210.72 and 71,775.36 is: 99,052.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,134.88 : 178,210.72 = 71,775.36 : x
  2. Step 2: Convert to fraction form
    129,134.88/178,210.72 = 71,775.36/x
  3. Step 3: Cross multiply
    129,134.88x = 178,210.72 × 71,775.36
  4. Step 4: Simplify right side
    129,134.88x = 12,791,138,583.86
  5. Step 5: Solve for x
    x = 12,791,138,583.86/129,134.88
  6. Step 6: Final answer
    x = 99,052.55

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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.