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Finding the Fourth Proportional to 61.36, 92.12 and 28.88

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Solution

The fourth proportional to 61.36, 92.12 and 28.88 is: 43.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.36 : 92.12 = 28.88 : x
  2. Step 2: Convert to fraction form
    61.36/92.12 = 28.88/x
  3. Step 3: Cross multiply
    61.36x = 92.12 × 28.88
  4. Step 4: Simplify right side
    61.36x = 2,660.43
  5. Step 5: Solve for x
    x = 2,660.43/61.36
  6. Step 6: Final answer
    x = 43.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.