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Finding the Fourth Proportional to 152.75, 229.28 and 71.65

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Solution

The fourth proportional to 152.75, 229.28 and 71.65 is: 107.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.75 : 229.28 = 71.65 : x
  2. Step 2: Convert to fraction form
    152.75/229.28 = 71.65/x
  3. Step 3: Cross multiply
    152.75x = 229.28 × 71.65
  4. Step 4: Simplify right side
    152.75x = 16,428.24
  5. Step 5: Solve for x
    x = 16,428.24/152.75
  6. Step 6: Final answer
    x = 107.55

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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.