Home / 80,941.70-121,412.55-68,111.30

Finding the Fourth Proportional to 80,941.70, 121,412.55 and 68,111.30

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Solution

The fourth proportional to 80,941.70, 121,412.55 and 68,111.30 is: 102,166.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,941.70 : 121,412.55 = 68,111.30 : x
  2. Step 2: Convert to fraction form
    80,941.70/121,412.55 = 68,111.30/x
  3. Step 3: Cross multiply
    80,941.70x = 121,412.55 × 68,111.30
  4. Step 4: Simplify right side
    80,941.70x = 8,269,566,616.82
  5. Step 5: Solve for x
    x = 8,269,566,616.82/80,941.70
  6. Step 6: Final answer
    x = 102,166.95

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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.