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Finding the Fourth Proportional to 61.92, 85.50 and 43.56

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Solution

The fourth proportional to 61.92, 85.50 and 43.56 is: 60.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.92 : 85.50 = 43.56 : x
  2. Step 2: Convert to fraction form
    61.92/85.50 = 43.56/x
  3. Step 3: Cross multiply
    61.92x = 85.50 × 43.56
  4. Step 4: Simplify right side
    61.92x = 3,724.38
  5. Step 5: Solve for x
    x = 3,724.38/61.92
  6. Step 6: Final answer
    x = 60.15

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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.