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Finding the Fourth Proportional to 108,489.63, 162,760.42 and 45,274.59

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Solution

The fourth proportional to 108,489.63, 162,760.42 and 45,274.59 is: 67,922.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,489.63 : 162,760.42 = 45,274.59 : x
  2. Step 2: Convert to fraction form
    108,489.63/162,760.42 = 45,274.59/x
  3. Step 3: Cross multiply
    108,489.63x = 162,760.42 × 45,274.59
  4. Step 4: Simplify right side
    108,489.63x = 7,368,910,729.97
  5. Step 5: Solve for x
    x = 7,368,910,729.97/108,489.63
  6. Step 6: Final answer
    x = 67,922.72

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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.