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Finding the Fourth Proportional to 152.89, 229.30 and 71.72

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Solution

The fourth proportional to 152.89, 229.30 and 71.72 is: 107.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.89 : 229.30 = 71.72 : x
  2. Step 2: Convert to fraction form
    152.89/229.30 = 71.72/x
  3. Step 3: Cross multiply
    152.89x = 229.30 × 71.72
  4. Step 4: Simplify right side
    152.89x = 16,445.40
  5. Step 5: Solve for x
    x = 16,445.40/152.89
  6. Step 6: Final answer
    x = 107.56

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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.