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Finding the Fourth Proportional to 67.15, 100.15 and 60.67

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Solution

The fourth proportional to 67.15, 100.15 and 60.67 is: 90.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.15 : 100.15 = 60.67 : x
  2. Step 2: Convert to fraction form
    67.15/100.15 = 60.67/x
  3. Step 3: Cross multiply
    67.15x = 100.15 × 60.67
  4. Step 4: Simplify right side
    67.15x = 6,076.10
  5. Step 5: Solve for x
    x = 6,076.10/67.15
  6. Step 6: Final answer
    x = 90.49

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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.