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Finding the Fourth Proportional to 158.68, 237.66 and 112.78

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Solution

The fourth proportional to 158.68, 237.66 and 112.78 is: 168.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.68 : 237.66 = 112.78 : x
  2. Step 2: Convert to fraction form
    158.68/237.66 = 112.78/x
  3. Step 3: Cross multiply
    158.68x = 237.66 × 112.78
  4. Step 4: Simplify right side
    158.68x = 26,803.29
  5. Step 5: Solve for x
    x = 26,803.29/158.68
  6. Step 6: Final answer
    x = 168.91

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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.