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Finding the Fourth Proportional to 147.54, 221.20 and 101.76

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Solution

The fourth proportional to 147.54, 221.20 and 101.76 is: 152.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.54 : 221.20 = 101.76 : x
  2. Step 2: Convert to fraction form
    147.54/221.20 = 101.76/x
  3. Step 3: Cross multiply
    147.54x = 221.20 × 101.76
  4. Step 4: Simplify right side
    147.54x = 22,509.31
  5. Step 5: Solve for x
    x = 22,509.31/147.54
  6. Step 6: Final answer
    x = 152.56

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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.