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Finding the Fourth Proportional to 53.92, 81.06 and 43.22

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Solution

The fourth proportional to 53.92, 81.06 and 43.22 is: 64.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.92 : 81.06 = 43.22 : x
  2. Step 2: Convert to fraction form
    53.92/81.06 = 43.22/x
  3. Step 3: Cross multiply
    53.92x = 81.06 × 43.22
  4. Step 4: Simplify right side
    53.92x = 3,503.41
  5. Step 5: Solve for x
    x = 3,503.41/53.92
  6. Step 6: Final answer
    x = 64.97

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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.