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Finding the Fourth Proportional to 108,565.20, 162,750.60 and 71,143.20

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Solution

The fourth proportional to 108,565.20, 162,750.60 and 71,143.20 is: 106,651.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,565.20 : 162,750.60 = 71,143.20 : x
  2. Step 2: Convert to fraction form
    108,565.20/162,750.60 = 71,143.20/x
  3. Step 3: Cross multiply
    108,565.20x = 162,750.60 × 71,143.20
  4. Step 4: Simplify right side
    108,565.20x = 11,578,598,485.92
  5. Step 5: Solve for x
    x = 11,578,598,485.92/108,565.20
  6. Step 6: Final answer
    x = 106,651.10

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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.