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Finding the Fourth Proportional to 92.75, 127.95 and 70.91

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Solution

The fourth proportional to 92.75, 127.95 and 70.91 is: 97.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.75 : 127.95 = 70.91 : x
  2. Step 2: Convert to fraction form
    92.75/127.95 = 70.91/x
  3. Step 3: Cross multiply
    92.75x = 127.95 × 70.91
  4. Step 4: Simplify right side
    92.75x = 9,072.93
  5. Step 5: Solve for x
    x = 9,072.93/92.75
  6. Step 6: Final answer
    x = 97.82

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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.