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Finding the Fourth Proportional to 108,020.20, 161,900.70 and 55,402.60

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Solution

The fourth proportional to 108,020.20, 161,900.70 and 55,402.60 is: 83,037.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,020.20 : 161,900.70 = 55,402.60 : x
  2. Step 2: Convert to fraction form
    108,020.20/161,900.70 = 55,402.60/x
  3. Step 3: Cross multiply
    108,020.20x = 161,900.70 × 55,402.60
  4. Step 4: Simplify right side
    108,020.20x = 8,969,719,721.82
  5. Step 5: Solve for x
    x = 8,969,719,721.82/108,020.20
  6. Step 6: Final answer
    x = 83,037.43

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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.