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Finding the Fourth Proportional to 137.30, 205.64 and 111.56

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Solution

The fourth proportional to 137.30, 205.64 and 111.56 is: 167.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.30 : 205.64 = 111.56 : x
  2. Step 2: Convert to fraction form
    137.30/205.64 = 111.56/x
  3. Step 3: Cross multiply
    137.30x = 205.64 × 111.56
  4. Step 4: Simplify right side
    137.30x = 22,941.20
  5. Step 5: Solve for x
    x = 22,941.20/137.30
  6. Step 6: Final answer
    x = 167.09

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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.