Home / 80,998.38-121,538.57-54,647.78

Finding the Fourth Proportional to 80,998.38, 121,538.57 and 54,647.78

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Solution

The fourth proportional to 80,998.38, 121,538.57 and 54,647.78 is: 81,999.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,998.38 : 121,538.57 = 54,647.78 : x
  2. Step 2: Convert to fraction form
    80,998.38/121,538.57 = 54,647.78/x
  3. Step 3: Cross multiply
    80,998.38x = 121,538.57 × 54,647.78
  4. Step 4: Simplify right side
    80,998.38x = 6,641,812,153.94
  5. Step 5: Solve for x
    x = 6,641,812,153.94/80,998.38
  6. Step 6: Final answer
    x = 81,999.32

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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.