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Finding the Fourth Proportional to 67.12, 93.14 and 66.56

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Solution

The fourth proportional to 67.12, 93.14 and 66.56 is: 92.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.12 : 93.14 = 66.56 : x
  2. Step 2: Convert to fraction form
    67.12/93.14 = 66.56/x
  3. Step 3: Cross multiply
    67.12x = 93.14 × 66.56
  4. Step 4: Simplify right side
    67.12x = 6,199.40
  5. Step 5: Solve for x
    x = 6,199.40/67.12
  6. Step 6: Final answer
    x = 92.36

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.