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Finding the Fourth Proportional to 102.14, 152.97 and 99.30

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Solution

The fourth proportional to 102.14, 152.97 and 99.30 is: 148.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.14 : 152.97 = 99.30 : x
  2. Step 2: Convert to fraction form
    102.14/152.97 = 99.30/x
  3. Step 3: Cross multiply
    102.14x = 152.97 × 99.30
  4. Step 4: Simplify right side
    102.14x = 15,189.92
  5. Step 5: Solve for x
    x = 15,189.92/102.14
  6. Step 6: Final answer
    x = 148.72

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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.