Home / 129,060.69-178,168.53-80,689.52

Finding the Fourth Proportional to 129,060.69, 178,168.53 and 80,689.52

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Solution

The fourth proportional to 129,060.69, 178,168.53 and 80,689.52 is: 111,392.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,060.69 : 178,168.53 = 80,689.52 : x
  2. Step 2: Convert to fraction form
    129,060.69/178,168.53 = 80,689.52/x
  3. Step 3: Cross multiply
    129,060.69x = 178,168.53 × 80,689.52
  4. Step 4: Simplify right side
    129,060.69x = 14,376,332,273.96
  5. Step 5: Solve for x
    x = 14,376,332,273.96/129,060.69
  6. Step 6: Final answer
    x = 111,392.03

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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.