Home / 129,076.32-178,134.80-72,491.04

Finding the Fourth Proportional to 129,076.32, 178,134.80 and 72,491.04

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Solution

The fourth proportional to 129,076.32, 178,134.80 and 72,491.04 is: 100,042.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,076.32 : 178,134.80 = 72,491.04 : x
  2. Step 2: Convert to fraction form
    129,076.32/178,134.80 = 72,491.04/x
  3. Step 3: Cross multiply
    129,076.32x = 178,134.80 × 72,491.04
  4. Step 4: Simplify right side
    129,076.32x = 12,913,176,912.19
  5. Step 5: Solve for x
    x = 12,913,176,912.19/129,076.32
  6. Step 6: Final answer
    x = 100,042.96

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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.