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Finding the Fourth Proportional to 53.91, 81.33 and 53.37

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Solution

The fourth proportional to 53.91, 81.33 and 53.37 is: 80.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.91 : 81.33 = 53.37 : x
  2. Step 2: Convert to fraction form
    53.91/81.33 = 53.37/x
  3. Step 3: Cross multiply
    53.91x = 81.33 × 53.37
  4. Step 4: Simplify right side
    53.91x = 4,340.58
  5. Step 5: Solve for x
    x = 4,340.58/53.91
  6. Step 6: Final answer
    x = 80.52

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.