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Finding the Fourth Proportional to 92.10, 127.04 and 55.25

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Solution

The fourth proportional to 92.10, 127.04 and 55.25 is: 76.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.10 : 127.04 = 55.25 : x
  2. Step 2: Convert to fraction form
    92.10/127.04 = 55.25/x
  3. Step 3: Cross multiply
    92.10x = 127.04 × 55.25
  4. Step 4: Simplify right side
    92.10x = 7,018.52
  5. Step 5: Solve for x
    x = 7,018.52/92.10
  6. Step 6: Final answer
    x = 76.20

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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.