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Finding the Fourth Proportional to 127,991.20, 191,727.60 and 88,592.80

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Solution

The fourth proportional to 127,991.20, 191,727.60 and 88,592.80 is: 132,709.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,991.20 : 191,727.60 = 88,592.80 : x
  2. Step 2: Convert to fraction form
    127,991.20/191,727.60 = 88,592.80/x
  3. Step 3: Cross multiply
    127,991.20x = 191,727.60 × 88,592.80
  4. Step 4: Simplify right side
    127,991.20x = 16,985,684,921.28
  5. Step 5: Solve for x
    x = 16,985,684,921.28/127,991.20
  6. Step 6: Final answer
    x = 132,709.79

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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.