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Finding the Fourth Proportional to 92.25, 127.09 and 64.57

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Solution

The fourth proportional to 92.25, 127.09 and 64.57 is: 88.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.25 : 127.09 = 64.57 : x
  2. Step 2: Convert to fraction form
    92.25/127.09 = 64.57/x
  3. Step 3: Cross multiply
    92.25x = 127.09 × 64.57
  4. Step 4: Simplify right side
    92.25x = 8,206.20
  5. Step 5: Solve for x
    x = 8,206.20/92.25
  6. Step 6: Final answer
    x = 88.96

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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.