Home / 81,961.08-113,091.63-49,691.90

Finding the Fourth Proportional to 81,961.08, 113,091.63 and 49,691.90

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Solution

The fourth proportional to 81,961.08, 113,091.63 and 49,691.90 is: 68,565.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,961.08 : 113,091.63 = 49,691.90 : x
  2. Step 2: Convert to fraction form
    81,961.08/113,091.63 = 49,691.90/x
  3. Step 3: Cross multiply
    81,961.08x = 113,091.63 × 49,691.90
  4. Step 4: Simplify right side
    81,961.08x = 5,619,737,403.34
  5. Step 5: Solve for x
    x = 5,619,737,403.34/81,961.08
  6. Step 6: Final answer
    x = 68,565.93

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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.