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Finding the Fourth Proportional to 80,881.86, 121,210.11 and 41,355.48

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Solution

The fourth proportional to 80,881.86, 121,210.11 and 41,355.48 is: 61,975.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,881.86 : 121,210.11 = 41,355.48 : x
  2. Step 2: Convert to fraction form
    80,881.86/121,210.11 = 41,355.48/x
  3. Step 3: Cross multiply
    80,881.86x = 121,210.11 × 41,355.48
  4. Step 4: Simplify right side
    80,881.86x = 5,012,702,279.90
  5. Step 5: Solve for x
    x = 5,012,702,279.90/80,881.86
  6. Step 6: Final answer
    x = 61,975.61

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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.