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Finding the Fourth Proportional to 67.36, 100.23 and 66.32

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Solution

The fourth proportional to 67.36, 100.23 and 66.32 is: 98.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.36 : 100.23 = 66.32 : x
  2. Step 2: Convert to fraction form
    67.36/100.23 = 66.32/x
  3. Step 3: Cross multiply
    67.36x = 100.23 × 66.32
  4. Step 4: Simplify right side
    67.36x = 6,647.25
  5. Step 5: Solve for x
    x = 6,647.25/67.36
  6. Step 6: Final answer
    x = 98.69

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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.