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Finding the Fourth Proportional to 147.46, 221.16 and 39.26

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Solution

The fourth proportional to 147.46, 221.16 and 39.26 is: 58.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.46 : 221.16 = 39.26 : x
  2. Step 2: Convert to fraction form
    147.46/221.16 = 39.26/x
  3. Step 3: Cross multiply
    147.46x = 221.16 × 39.26
  4. Step 4: Simplify right side
    147.46x = 8,681.64
  5. Step 5: Solve for x
    x = 8,681.64/147.46
  6. Step 6: Final answer
    x = 58.88

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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.