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Finding the Fourth Proportional to 158.58, 237.51 and 129.78

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Solution

The fourth proportional to 158.58, 237.51 and 129.78 is: 194.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.58 : 237.51 = 129.78 : x
  2. Step 2: Convert to fraction form
    158.58/237.51 = 129.78/x
  3. Step 3: Cross multiply
    158.58x = 237.51 × 129.78
  4. Step 4: Simplify right side
    158.58x = 30,824.05
  5. Step 5: Solve for x
    x = 30,824.05/158.58
  6. Step 6: Final answer
    x = 194.38

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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.