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Finding the Fourth Proportional to 158.87, 236.66 and 148.90

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Solution

The fourth proportional to 158.87, 236.66 and 148.90 is: 221.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.87 : 236.66 = 148.90 : x
  2. Step 2: Convert to fraction form
    158.87/236.66 = 148.90/x
  3. Step 3: Cross multiply
    158.87x = 236.66 × 148.90
  4. Step 4: Simplify right side
    158.87x = 35,238.67
  5. Step 5: Solve for x
    x = 35,238.67/158.87
  6. Step 6: Final answer
    x = 221.81

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.