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Finding the Fourth Proportional to 111.50, 167.01 and 53.64

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Solution

The fourth proportional to 111.50, 167.01 and 53.64 is: 80.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    111.50 : 167.01 = 53.64 : x
  2. Step 2: Convert to fraction form
    111.50/167.01 = 53.64/x
  3. Step 3: Cross multiply
    111.50x = 167.01 × 53.64
  4. Step 4: Simplify right side
    111.50x = 8,958.42
  5. Step 5: Solve for x
    x = 8,958.42/111.50
  6. Step 6: Final answer
    x = 80.35

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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.