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Finding the Fourth Proportional to 108.65, 149.50 and 104.04

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Solution

The fourth proportional to 108.65, 149.50 and 104.04 is: 143.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.65 : 149.50 = 104.04 : x
  2. Step 2: Convert to fraction form
    108.65/149.50 = 104.04/x
  3. Step 3: Cross multiply
    108.65x = 149.50 × 104.04
  4. Step 4: Simplify right side
    108.65x = 15,553.87
  5. Step 5: Solve for x
    x = 15,553.87/108.65
  6. Step 6: Final answer
    x = 143.16

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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.