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Finding the Fourth Proportional to 108,640.20, 162,863.10 and 71,218.20

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Solution

The fourth proportional to 108,640.20, 162,863.10 and 71,218.20 is: 106,763.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,640.20 : 162,863.10 = 71,218.20 : x
  2. Step 2: Convert to fraction form
    108,640.20/162,863.10 = 71,218.20/x
  3. Step 3: Cross multiply
    108,640.20x = 162,863.10 × 71,218.20
  4. Step 4: Simplify right side
    108,640.20x = 11,598,816,828.42
  5. Step 5: Solve for x
    x = 11,598,816,828.42/108,640.20
  6. Step 6: Final answer
    x = 106,763.58

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1.5x scale

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.