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Finding the Fourth Proportional to 92.18, 127.22 and 64.56

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Solution

The fourth proportional to 92.18, 127.22 and 64.56 is: 89.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.18 : 127.22 = 64.56 : x
  2. Step 2: Convert to fraction form
    92.18/127.22 = 64.56/x
  3. Step 3: Cross multiply
    92.18x = 127.22 × 64.56
  4. Step 4: Simplify right side
    92.18x = 8,213.40
  5. Step 5: Solve for x
    x = 8,213.40/92.18
  6. Step 6: Final answer
    x = 89.10

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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.