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Finding the Fourth Proportional to 100.30, 151.24 and 99.28

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Solution

The fourth proportional to 100.30, 151.24 and 99.28 is: 149.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    100.30 : 151.24 = 99.28 : x
  2. Step 2: Convert to fraction form
    100.30/151.24 = 99.28/x
  3. Step 3: Cross multiply
    100.30x = 151.24 × 99.28
  4. Step 4: Simplify right side
    100.30x = 15,015.11
  5. Step 5: Solve for x
    x = 15,015.11/100.30
  6. Step 6: Final answer
    x = 149.70

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.