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Finding the Fourth Proportional to 158.50, 238.89 and 149.68

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Solution

The fourth proportional to 158.50, 238.89 and 149.68 is: 225.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.50 : 238.89 = 149.68 : x
  2. Step 2: Convert to fraction form
    158.50/238.89 = 149.68/x
  3. Step 3: Cross multiply
    158.50x = 238.89 × 149.68
  4. Step 4: Simplify right side
    158.50x = 35,757.06
  5. Step 5: Solve for x
    x = 35,757.06/158.50
  6. Step 6: Final answer
    x = 225.60

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.