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Finding the Fourth Proportional to 108,697.20, 162,916.20 and 45,517.20

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Solution

The fourth proportional to 108,697.20, 162,916.20 and 45,517.20 is: 68,221.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,697.20 : 162,916.20 = 45,517.20 : x
  2. Step 2: Convert to fraction form
    108,697.20/162,916.20 = 45,517.20/x
  3. Step 3: Cross multiply
    108,697.20x = 162,916.20 × 45,517.20
  4. Step 4: Simplify right side
    108,697.20x = 7,415,489,258.64
  5. Step 5: Solve for x
    x = 7,415,489,258.64/108,697.20
  6. Step 6: Final answer
    x = 68,221.53

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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.