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Finding the Fourth Proportional to 115.85, 173.56 and 67.05

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Solution

The fourth proportional to 115.85, 173.56 and 67.05 is: 100.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.85 : 173.56 = 67.05 : x
  2. Step 2: Convert to fraction form
    115.85/173.56 = 67.05/x
  3. Step 3: Cross multiply
    115.85x = 173.56 × 67.05
  4. Step 4: Simplify right side
    115.85x = 11,637.20
  5. Step 5: Solve for x
    x = 11,637.20/115.85
  6. Step 6: Final answer
    x = 100.45

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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.