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Finding the Fourth Proportional to 92.30, 127.23 and 72.86

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Solution

The fourth proportional to 92.30, 127.23 and 72.86 is: 100.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.30 : 127.23 = 72.86 : x
  2. Step 2: Convert to fraction form
    92.30/127.23 = 72.86/x
  3. Step 3: Cross multiply
    92.30x = 127.23 × 72.86
  4. Step 4: Simplify right side
    92.30x = 9,269.98
  5. Step 5: Solve for x
    x = 9,269.98/92.30
  6. Step 6: Final answer
    x = 100.43

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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.