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Finding the Fourth Proportional to 48.01, 66.20 and 42.17

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Solution

The fourth proportional to 48.01, 66.20 and 42.17 is: 58.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.01 : 66.20 = 42.17 : x
  2. Step 2: Convert to fraction form
    48.01/66.20 = 42.17/x
  3. Step 3: Cross multiply
    48.01x = 66.20 × 42.17
  4. Step 4: Simplify right side
    48.01x = 2,791.65
  5. Step 5: Solve for x
    x = 2,791.65/48.01
  6. Step 6: Final answer
    x = 58.15

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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.