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Finding the Fourth Proportional to 147.54, 221.49 and 117.48

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Solution

The fourth proportional to 147.54, 221.49 and 117.48 is: 176.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.54 : 221.49 = 117.48 : x
  2. Step 2: Convert to fraction form
    147.54/221.49 = 117.48/x
  3. Step 3: Cross multiply
    147.54x = 221.49 × 117.48
  4. Step 4: Simplify right side
    147.54x = 26,020.65
  5. Step 5: Solve for x
    x = 26,020.65/147.54
  6. Step 6: Final answer
    x = 176.36

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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.