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Finding the Fourth Proportional to 104.49, 156.74 and 100.17

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Solution

The fourth proportional to 104.49, 156.74 and 100.17 is: 150.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.49 : 156.74 = 100.17 : x
  2. Step 2: Convert to fraction form
    104.49/156.74 = 100.17/x
  3. Step 3: Cross multiply
    104.49x = 156.74 × 100.17
  4. Step 4: Simplify right side
    104.49x = 15,700.14
  5. Step 5: Solve for x
    x = 15,700.14/104.49
  6. Step 6: Final answer
    x = 150.26

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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.