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Finding the Fourth Proportional to 67.31, 100.37 and 59.22

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Solution

The fourth proportional to 67.31, 100.37 and 59.22 is: 88.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.31 : 100.37 = 59.22 : x
  2. Step 2: Convert to fraction form
    67.31/100.37 = 59.22/x
  3. Step 3: Cross multiply
    67.31x = 100.37 × 59.22
  4. Step 4: Simplify right side
    67.31x = 5,943.62
  5. Step 5: Solve for x
    x = 5,943.62/67.31
  6. Step 6: Final answer
    x = 88.31

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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.