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Finding the Fourth Proportional to 152.75, 229.09 and 66.14

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Solution

The fourth proportional to 152.75, 229.09 and 66.14 is: 99.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.75 : 229.09 = 66.14 : x
  2. Step 2: Convert to fraction form
    152.75/229.09 = 66.14/x
  3. Step 3: Cross multiply
    152.75x = 229.09 × 66.14
  4. Step 4: Simplify right side
    152.75x = 15,152.01
  5. Step 5: Solve for x
    x = 15,152.01/152.75
  6. Step 6: Final answer
    x = 99.19

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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.