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Finding the Fourth Proportional to 123,439.20, 185,158.80 and 108,664.80

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Solution

The fourth proportional to 123,439.20, 185,158.80 and 108,664.80 is: 162,997.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,439.20 : 185,158.80 = 108,664.80 : x
  2. Step 2: Convert to fraction form
    123,439.20/185,158.80 = 108,664.80/x
  3. Step 3: Cross multiply
    123,439.20x = 185,158.80 × 108,664.80
  4. Step 4: Simplify right side
    123,439.20x = 20,120,243,970.24
  5. Step 5: Solve for x
    x = 20,120,243,970.24/123,439.20
  6. Step 6: Final answer
    x = 162,997.20

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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.