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Finding the Fourth Proportional to 100,704.52, 138,961.46 and 58,255.12

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Solution

The fourth proportional to 100,704.52, 138,961.46 and 58,255.12 is: 80,385.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,704.52 : 138,961.46 = 58,255.12 : x
  2. Step 2: Convert to fraction form
    100,704.52/138,961.46 = 58,255.12/x
  3. Step 3: Cross multiply
    100,704.52x = 138,961.46 × 58,255.12
  4. Step 4: Simplify right side
    100,704.52x = 8,095,216,527.68
  5. Step 5: Solve for x
    x = 8,095,216,527.68/100,704.52
  6. Step 6: Final answer
    x = 80,385.83

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1.5x scale

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.