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Finding the Fourth Proportional to 147.32, 221.78 and 134.76

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Solution

The fourth proportional to 147.32, 221.78 and 134.76 is: 202.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.32 : 221.78 = 134.76 : x
  2. Step 2: Convert to fraction form
    147.32/221.78 = 134.76/x
  3. Step 3: Cross multiply
    147.32x = 221.78 × 134.76
  4. Step 4: Simplify right side
    147.32x = 29,887.07
  5. Step 5: Solve for x
    x = 29,887.07/147.32
  6. Step 6: Final answer
    x = 202.87

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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.