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Finding the Fourth Proportional to 67.76, 93.52 and 40.14

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Solution

The fourth proportional to 67.76, 93.52 and 40.14 is: 55.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.76 : 93.52 = 40.14 : x
  2. Step 2: Convert to fraction form
    67.76/93.52 = 40.14/x
  3. Step 3: Cross multiply
    67.76x = 93.52 × 40.14
  4. Step 4: Simplify right side
    67.76x = 3,753.79
  5. Step 5: Solve for x
    x = 3,753.79/67.76
  6. Step 6: Final answer
    x = 55.40

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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.