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Finding the Fourth Proportional to 157.20, 235.65 and 132.54

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Solution

The fourth proportional to 157.20, 235.65 and 132.54 is: 198.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.20 : 235.65 = 132.54 : x
  2. Step 2: Convert to fraction form
    157.20/235.65 = 132.54/x
  3. Step 3: Cross multiply
    157.20x = 235.65 × 132.54
  4. Step 4: Simplify right side
    157.20x = 31,233.05
  5. Step 5: Solve for x
    x = 31,233.05/157.20
  6. Step 6: Final answer
    x = 198.68

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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.