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Finding the Fourth Proportional to 92.17, 127.04 and 78.95

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Solution

The fourth proportional to 92.17, 127.04 and 78.95 is: 108.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.17 : 127.04 = 78.95 : x
  2. Step 2: Convert to fraction form
    92.17/127.04 = 78.95/x
  3. Step 3: Cross multiply
    92.17x = 127.04 × 78.95
  4. Step 4: Simplify right side
    92.17x = 10,030.32
  5. Step 5: Solve for x
    x = 10,030.32/92.17
  6. Step 6: Final answer
    x = 108.83

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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.