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Finding the Fourth Proportional to 102.42, 152.52 and 99.84

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Solution

The fourth proportional to 102.42, 152.52 and 99.84 is: 148.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.42 : 152.52 = 99.84 : x
  2. Step 2: Convert to fraction form
    102.42/152.52 = 99.84/x
  3. Step 3: Cross multiply
    102.42x = 152.52 × 99.84
  4. Step 4: Simplify right side
    102.42x = 15,227.60
  5. Step 5: Solve for x
    x = 15,227.60/102.42
  6. Step 6: Final answer
    x = 148.68

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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.