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Finding the Fourth Proportional to 102.48, 153.04 and 99.24

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Solution

The fourth proportional to 102.48, 153.04 and 99.24 is: 148.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.48 : 153.04 = 99.24 : x
  2. Step 2: Convert to fraction form
    102.48/153.04 = 99.24/x
  3. Step 3: Cross multiply
    102.48x = 153.04 × 99.24
  4. Step 4: Simplify right side
    102.48x = 15,187.69
  5. Step 5: Solve for x
    x = 15,187.69/102.48
  6. Step 6: Final answer
    x = 148.20

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.