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Finding the Fourth Proportional to 92.12, 126.95 and 67.55

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Solution

The fourth proportional to 92.12, 126.95 and 67.55 is: 93.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.12 : 126.95 = 67.55 : x
  2. Step 2: Convert to fraction form
    92.12/126.95 = 67.55/x
  3. Step 3: Cross multiply
    92.12x = 126.95 × 67.55
  4. Step 4: Simplify right side
    92.12x = 8,574.50
  5. Step 5: Solve for x
    x = 8,574.50/92.12
  6. Step 6: Final answer
    x = 93.08

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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.