Home / 108,217.20-149,385.72-65,789.28

Finding the Fourth Proportional to 108,217.20, 149,385.72 and 65,789.28

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Solution

The fourth proportional to 108,217.20, 149,385.72 and 65,789.28 is: 90,817.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,217.20 : 149,385.72 = 65,789.28 : x
  2. Step 2: Convert to fraction form
    108,217.20/149,385.72 = 65,789.28/x
  3. Step 3: Cross multiply
    108,217.20x = 149,385.72 × 65,789.28
  4. Step 4: Simplify right side
    108,217.20x = 9,827,978,961.08
  5. Step 5: Solve for x
    x = 9,827,978,961.08/108,217.20
  6. Step 6: Final answer
    x = 90,817.16

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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.