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Finding the Fourth Proportional to 147.76, 221.16 and 106.60

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Solution

The fourth proportional to 147.76, 221.16 and 106.60 is: 159.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.76 : 221.16 = 106.60 : x
  2. Step 2: Convert to fraction form
    147.76/221.16 = 106.60/x
  3. Step 3: Cross multiply
    147.76x = 221.16 × 106.60
  4. Step 4: Simplify right side
    147.76x = 23,575.66
  5. Step 5: Solve for x
    x = 23,575.66/147.76
  6. Step 6: Final answer
    x = 159.55

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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.