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Finding the Fourth Proportional to 92.75, 127.88 and 68.18

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Solution

The fourth proportional to 92.75, 127.88 and 68.18 is: 94.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.75 : 127.88 = 68.18 : x
  2. Step 2: Convert to fraction form
    92.75/127.88 = 68.18/x
  3. Step 3: Cross multiply
    92.75x = 127.88 × 68.18
  4. Step 4: Simplify right side
    92.75x = 8,718.13
  5. Step 5: Solve for x
    x = 8,718.13/92.75
  6. Step 6: Final answer
    x = 94.00

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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.