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Finding the Fourth Proportional to 100,785.80, 151,108.78 and 85,092.92

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Solution

The fourth proportional to 100,785.80, 151,108.78 and 85,092.92 is: 127,580.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,785.80 : 151,108.78 = 85,092.92 : x
  2. Step 2: Convert to fraction form
    100,785.80/151,108.78 = 85,092.92/x
  3. Step 3: Cross multiply
    100,785.80x = 151,108.78 × 85,092.92
  4. Step 4: Simplify right side
    100,785.80x = 12,858,287,327.84
  5. Step 5: Solve for x
    x = 12,858,287,327.84/100,785.80
  6. Step 6: Final answer
    x = 127,580.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.