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Finding the Fourth Proportional to 127,999.20, 191,739.60 and 88,600.80

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Solution

The fourth proportional to 127,999.20, 191,739.60 and 88,600.80 is: 132,721.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,999.20 : 191,739.60 = 88,600.80 : x
  2. Step 2: Convert to fraction form
    127,999.20/191,739.60 = 88,600.80/x
  3. Step 3: Cross multiply
    127,999.20x = 191,739.60 × 88,600.80
  4. Step 4: Simplify right side
    127,999.20x = 16,988,281,951.68
  5. Step 5: Solve for x
    x = 16,988,281,951.68/127,999.20
  6. Step 6: Final answer
    x = 132,721.78

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1.5x scale

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.