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Finding the Fourth Proportional to 127,687.20, 191,530.80 and 48,760.80

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Solution

The fourth proportional to 127,687.20, 191,530.80 and 48,760.80 is: 73,141.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,687.20 : 191,530.80 = 48,760.80 : x
  2. Step 2: Convert to fraction form
    127,687.20/191,530.80 = 48,760.80/x
  3. Step 3: Cross multiply
    127,687.20x = 191,530.80 × 48,760.80
  4. Step 4: Simplify right side
    127,687.20x = 9,339,195,032.64
  5. Step 5: Solve for x
    x = 9,339,195,032.64/127,687.20
  6. Step 6: Final answer
    x = 73,141.20

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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.