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Finding the Fourth Proportional to 147.20, 203.10 and 95.42

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Solution

The fourth proportional to 147.20, 203.10 and 95.42 is: 131.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.20 : 203.10 = 95.42 : x
  2. Step 2: Convert to fraction form
    147.20/203.10 = 95.42/x
  3. Step 3: Cross multiply
    147.20x = 203.10 × 95.42
  4. Step 4: Simplify right side
    147.20x = 19,379.80
  5. Step 5: Solve for x
    x = 19,379.80/147.20
  6. Step 6: Final answer
    x = 131.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.