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Finding the Fourth Proportional to 92.32, 127.45 and 61.31

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Solution

The fourth proportional to 92.32, 127.45 and 61.31 is: 84.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.32 : 127.45 = 61.31 : x
  2. Step 2: Convert to fraction form
    92.32/127.45 = 61.31/x
  3. Step 3: Cross multiply
    92.32x = 127.45 × 61.31
  4. Step 4: Simplify right side
    92.32x = 7,813.47
  5. Step 5: Solve for x
    x = 7,813.47/92.32
  6. Step 6: Final answer
    x = 84.64

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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.