Home / 80,943.70-121,415.55-68,113.30

Finding the Fourth Proportional to 80,943.70, 121,415.55 and 68,113.30

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Solution

The fourth proportional to 80,943.70, 121,415.55 and 68,113.30 is: 102,169.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,943.70 : 121,415.55 = 68,113.30 : x
  2. Step 2: Convert to fraction form
    80,943.70/121,415.55 = 68,113.30/x
  3. Step 3: Cross multiply
    80,943.70x = 121,415.55 × 68,113.30
  4. Step 4: Simplify right side
    80,943.70x = 8,270,013,781.82
  5. Step 5: Solve for x
    x = 8,270,013,781.82/80,943.70
  6. Step 6: Final answer
    x = 102,169.95

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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.