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Finding the Fourth Proportional to 67.01, 100.54 and 21.36

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Solution

The fourth proportional to 67.01, 100.54 and 21.36 is: 32.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.01 : 100.54 = 21.36 : x
  2. Step 2: Convert to fraction form
    67.01/100.54 = 21.36/x
  3. Step 3: Cross multiply
    67.01x = 100.54 × 21.36
  4. Step 4: Simplify right side
    67.01x = 2,147.53
  5. Step 5: Solve for x
    x = 2,147.53/67.01
  6. Step 6: Final answer
    x = 32.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.