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Finding the Fourth Proportional to 67.29, 93.31 and 65.22

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Solution

The fourth proportional to 67.29, 93.31 and 65.22 is: 90.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.29 : 93.31 = 65.22 : x
  2. Step 2: Convert to fraction form
    67.29/93.31 = 65.22/x
  3. Step 3: Cross multiply
    67.29x = 93.31 × 65.22
  4. Step 4: Simplify right side
    67.29x = 6,085.68
  5. Step 5: Solve for x
    x = 6,085.68/67.29
  6. Step 6: Final answer
    x = 90.44

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.