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Finding the Fourth Proportional to 158.10, 236.85 and 111.66

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Solution

The fourth proportional to 158.10, 236.85 and 111.66 is: 167.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.10 : 236.85 = 111.66 : x
  2. Step 2: Convert to fraction form
    158.10/236.85 = 111.66/x
  3. Step 3: Cross multiply
    158.10x = 236.85 × 111.66
  4. Step 4: Simplify right side
    158.10x = 26,446.67
  5. Step 5: Solve for x
    x = 26,446.67/158.10
  6. Step 6: Final answer
    x = 167.28

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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.