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Finding the Fourth Proportional to 92.38, 127.48 and 55.54

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Solution

The fourth proportional to 92.38, 127.48 and 55.54 is: 76.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.38 : 127.48 = 55.54 : x
  2. Step 2: Convert to fraction form
    92.38/127.48 = 55.54/x
  3. Step 3: Cross multiply
    92.38x = 127.48 × 55.54
  4. Step 4: Simplify right side
    92.38x = 7,080.24
  5. Step 5: Solve for x
    x = 7,080.24/92.38
  6. Step 6: Final answer
    x = 76.64

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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.