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Finding the Fourth Proportional to 102.48, 153.38 and 100.14

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Solution

The fourth proportional to 102.48, 153.38 and 100.14 is: 149.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.48 : 153.38 = 100.14 : x
  2. Step 2: Convert to fraction form
    102.48/153.38 = 100.14/x
  3. Step 3: Cross multiply
    102.48x = 153.38 × 100.14
  4. Step 4: Simplify right side
    102.48x = 15,359.47
  5. Step 5: Solve for x
    x = 15,359.47/102.48
  6. Step 6: Final answer
    x = 149.88

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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.