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Finding the Fourth Proportional to 67.56, 101.20 and 40.48

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Solution

The fourth proportional to 67.56, 101.20 and 40.48 is: 60.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.56 : 101.20 = 40.48 : x
  2. Step 2: Convert to fraction form
    67.56/101.20 = 40.48/x
  3. Step 3: Cross multiply
    67.56x = 101.20 × 40.48
  4. Step 4: Simplify right side
    67.56x = 4,096.58
  5. Step 5: Solve for x
    x = 4,096.58/67.56
  6. Step 6: Final answer
    x = 60.64

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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.