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Finding the Fourth Proportional to 67.95, 102.02 and 40.95

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Solution

The fourth proportional to 67.95, 102.02 and 40.95 is: 61.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.95 : 102.02 = 40.95 : x
  2. Step 2: Convert to fraction form
    67.95/102.02 = 40.95/x
  3. Step 3: Cross multiply
    67.95x = 102.02 × 40.95
  4. Step 4: Simplify right side
    67.95x = 4,177.51
  5. Step 5: Solve for x
    x = 4,177.51/67.95
  6. Step 6: Final answer
    x = 61.48

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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.