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Finding the Fourth Proportional to 67.02, 100.54 and 21.37

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Solution

The fourth proportional to 67.02, 100.54 and 21.37 is: 32.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.02 : 100.54 = 21.37 : x
  2. Step 2: Convert to fraction form
    67.02/100.54 = 21.37/x
  3. Step 3: Cross multiply
    67.02x = 100.54 × 21.37
  4. Step 4: Simplify right side
    67.02x = 2,148.24
  5. Step 5: Solve for x
    x = 2,148.24/67.02
  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.