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Finding the Fourth Proportional to 67.15, 100.11 and 57.03

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Solution

The fourth proportional to 67.15, 100.11 and 57.03 is: 85.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.15 : 100.11 = 57.03 : x
  2. Step 2: Convert to fraction form
    67.15/100.11 = 57.03/x
  3. Step 3: Cross multiply
    67.15x = 100.11 × 57.03
  4. Step 4: Simplify right side
    67.15x = 5,709.27
  5. Step 5: Solve for x
    x = 5,709.27/67.15
  6. Step 6: Final answer
    x = 85.02

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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.