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Finding the Fourth Proportional to 152.81, 229.14 and 66.09

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Solution

The fourth proportional to 152.81, 229.14 and 66.09 is: 99.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.81 : 229.14 = 66.09 : x
  2. Step 2: Convert to fraction form
    152.81/229.14 = 66.09/x
  3. Step 3: Cross multiply
    152.81x = 229.14 × 66.09
  4. Step 4: Simplify right side
    152.81x = 15,143.86
  5. Step 5: Solve for x
    x = 15,143.86/152.81
  6. Step 6: Final answer
    x = 99.10

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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.