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Finding the Fourth Proportional to 152.97, 229.58 and 66.39

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Solution

The fourth proportional to 152.97, 229.58 and 66.39 is: 99.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.97 : 229.58 = 66.39 : x
  2. Step 2: Convert to fraction form
    152.97/229.58 = 66.39/x
  3. Step 3: Cross multiply
    152.97x = 229.58 × 66.39
  4. Step 4: Simplify right side
    152.97x = 15,241.48
  5. Step 5: Solve for x
    x = 15,241.48/152.97
  6. Step 6: Final answer
    x = 99.64

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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.