Home / 80,789.11-121,076.74-61,997.34

Finding the Fourth Proportional to 80,789.11, 121,076.74 and 61,997.34

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Solution

The fourth proportional to 80,789.11, 121,076.74 and 61,997.34 is: 92,913.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,789.11 : 121,076.74 = 61,997.34 : x
  2. Step 2: Convert to fraction form
    80,789.11/121,076.74 = 61,997.34/x
  3. Step 3: Cross multiply
    80,789.11x = 121,076.74 × 61,997.34
  4. Step 4: Simplify right side
    80,789.11x = 7,506,435,815.87
  5. Step 5: Solve for x
    x = 7,506,435,815.87/80,789.11
  6. Step 6: Final answer
    x = 92,913.96

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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.