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Finding the Fourth Proportional to 159,861.20, 220,530.12 and 103,321.04

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Solution

The fourth proportional to 159,861.20, 220,530.12 and 103,321.04 is: 142,532.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,861.20 : 220,530.12 = 103,321.04 : x
  2. Step 2: Convert to fraction form
    159,861.20/220,530.12 = 103,321.04/x
  3. Step 3: Cross multiply
    159,861.20x = 220,530.12 × 103,321.04
  4. Step 4: Simplify right side
    159,861.20x = 22,785,401,349.72
  5. Step 5: Solve for x
    x = 22,785,401,349.72/159,861.20
  6. Step 6: Final answer
    x = 142,532.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.