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Finding the Fourth Proportional to 92.02, 127 and 55.20

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Solution

The fourth proportional to 92.02, 127 and 55.20 is: 76.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.02 : 127 = 55.20 : x
  2. Step 2: Convert to fraction form
    92.02/127 = 55.20/x
  3. Step 3: Cross multiply
    92.02x = 127 × 55.20
  4. Step 4: Simplify right side
    92.02x = 7,010.40
  5. Step 5: Solve for x
    x = 7,010.40/92.02
  6. Step 6: Final answer
    x = 76.18

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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.