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Finding the Fourth Proportional to 137,610.40, 189,919.92 and 81,027.04

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Solution

The fourth proportional to 137,610.40, 189,919.92 and 81,027.04 is: 111,827.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,610.40 : 189,919.92 = 81,027.04 : x
  2. Step 2: Convert to fraction form
    137,610.40/189,919.92 = 81,027.04/x
  3. Step 3: Cross multiply
    137,610.40x = 189,919.92 × 81,027.04
  4. Step 4: Simplify right side
    137,610.40x = 15,388,648,954.64
  5. Step 5: Solve for x
    x = 15,388,648,954.64/137,610.40
  6. Step 6: Final answer
    x = 111,827.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.