Home / 129,375.06-178,532.92-72,012.48

Finding the Fourth Proportional to 129,375.06, 178,532.92 and 72,012.48

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Solution

The fourth proportional to 129,375.06, 178,532.92 and 72,012.48 is: 99,374.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,375.06 : 178,532.92 = 72,012.48 : x
  2. Step 2: Convert to fraction form
    129,375.06/178,532.92 = 72,012.48/x
  3. Step 3: Cross multiply
    129,375.06x = 178,532.92 × 72,012.48
  4. Step 4: Simplify right side
    129,375.06x = 12,856,598,330.84
  5. Step 5: Solve for x
    x = 12,856,598,330.84/129,375.06
  6. Step 6: Final answer
    x = 99,374.63

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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.