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Finding the Fourth Proportional to 53.68, 80.23 and 38.36

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Solution

The fourth proportional to 53.68, 80.23 and 38.36 is: 57.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.68 : 80.23 = 38.36 : x
  2. Step 2: Convert to fraction form
    53.68/80.23 = 38.36/x
  3. Step 3: Cross multiply
    53.68x = 80.23 × 38.36
  4. Step 4: Simplify right side
    53.68x = 3,077.62
  5. Step 5: Solve for x
    x = 3,077.62/53.68
  6. Step 6: Final answer
    x = 57.33

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.