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Finding the Fourth Proportional to 108,020.40, 162,203.40 and 73,114.80

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Solution

The fourth proportional to 108,020.40, 162,203.40 and 73,114.80 is: 109,789.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,020.40 : 162,203.40 = 73,114.80 : x
  2. Step 2: Convert to fraction form
    108,020.40/162,203.40 = 73,114.80/x
  3. Step 3: Cross multiply
    108,020.40x = 162,203.40 × 73,114.80
  4. Step 4: Simplify right side
    108,020.40x = 11,859,469,150.32
  5. Step 5: Solve for x
    x = 11,859,469,150.32/108,020.40
  6. Step 6: Final answer
    x = 109,789.16

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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.