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Finding the Fourth Proportional to 147.75, 220.55 and 126.96

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Solution

The fourth proportional to 147.75, 220.55 and 126.96 is: 189.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.75 : 220.55 = 126.96 : x
  2. Step 2: Convert to fraction form
    147.75/220.55 = 126.96/x
  3. Step 3: Cross multiply
    147.75x = 220.55 × 126.96
  4. Step 4: Simplify right side
    147.75x = 27,999.93
  5. Step 5: Solve for x
    x = 27,999.93/147.75
  6. Step 6: Final answer
    x = 189.52

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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.