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Finding the Fourth Proportional to 157.38, 235.95 and 88.74

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Solution

The fourth proportional to 157.38, 235.95 and 88.74 is: 133.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.38 : 235.95 = 88.74 : x
  2. Step 2: Convert to fraction form
    157.38/235.95 = 88.74/x
  3. Step 3: Cross multiply
    157.38x = 235.95 × 88.74
  4. Step 4: Simplify right side
    157.38x = 20,938.20
  5. Step 5: Solve for x
    x = 20,938.20/157.38
  6. Step 6: Final answer
    x = 133.04

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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.