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Finding the Fourth Proportional to 158,750.57, 219,079.94 and 90,778.61

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Solution

The fourth proportional to 158,750.57, 219,079.94 and 90,778.61 is: 125,276.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,750.57 : 219,079.94 = 90,778.61 : x
  2. Step 2: Convert to fraction form
    158,750.57/219,079.94 = 90,778.61/x
  3. Step 3: Cross multiply
    158,750.57x = 219,079.94 × 90,778.61
  4. Step 4: Simplify right side
    158,750.57x = 19,887,770,882.79
  5. Step 5: Solve for x
    x = 19,887,770,882.79/158,750.57
  6. Step 6: Final answer
    x = 125,276.85

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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.