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Finding the Fourth Proportional to 92.69, 127.70 and 71.89

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Solution

The fourth proportional to 92.69, 127.70 and 71.89 is: 99.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.69 : 127.70 = 71.89 : x
  2. Step 2: Convert to fraction form
    92.69/127.70 = 71.89/x
  3. Step 3: Cross multiply
    92.69x = 127.70 × 71.89
  4. Step 4: Simplify right side
    92.69x = 9,180.35
  5. Step 5: Solve for x
    x = 9,180.35/92.69
  6. Step 6: Final answer
    x = 99.04

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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.