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Finding the Fourth Proportional to 111.15, 166.64 and 53.37

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Solution

The fourth proportional to 111.15, 166.64 and 53.37 is: 80.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    111.15 : 166.64 = 53.37 : x
  2. Step 2: Convert to fraction form
    111.15/166.64 = 53.37/x
  3. Step 3: Cross multiply
    111.15x = 166.64 × 53.37
  4. Step 4: Simplify right side
    111.15x = 8,893.31
  5. Step 5: Solve for x
    x = 8,893.31/111.15
  6. Step 6: Final answer
    x = 80.01

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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.