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Finding the Fourth Proportional to 67.77, 101.75 and 42.14

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Solution

The fourth proportional to 67.77, 101.75 and 42.14 is: 63.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.77 : 101.75 = 42.14 : x
  2. Step 2: Convert to fraction form
    67.77/101.75 = 42.14/x
  3. Step 3: Cross multiply
    67.77x = 101.75 × 42.14
  4. Step 4: Simplify right side
    67.77x = 4,287.79
  5. Step 5: Solve for x
    x = 4,287.79/67.77
  6. Step 6: Final answer
    x = 63.27

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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.