Home / 108,531.20-162,699.60-71,109.20

Finding the Fourth Proportional to 108,531.20, 162,699.60 and 71,109.20

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Solution

The fourth proportional to 108,531.20, 162,699.60 and 71,109.20 is: 106,600.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,531.20 : 162,699.60 = 71,109.20 : x
  2. Step 2: Convert to fraction form
    108,531.20/162,699.60 = 71,109.20/x
  3. Step 3: Cross multiply
    108,531.20x = 162,699.60 × 71,109.20
  4. Step 4: Simplify right side
    108,531.20x = 11,569,438,396.32
  5. Step 5: Solve for x
    x = 11,569,438,396.32/108,531.20
  6. Step 6: Final answer
    x = 106,600.11

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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.