Home / 81,440.13-122,140.89-45,917.19

Finding the Fourth Proportional to 81,440.13, 122,140.89 and 45,917.19

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Solution

The fourth proportional to 81,440.13, 122,140.89 and 45,917.19 is: 68,864.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,440.13 : 122,140.89 = 45,917.19 : x
  2. Step 2: Convert to fraction form
    81,440.13/122,140.89 = 45,917.19/x
  3. Step 3: Cross multiply
    81,440.13x = 122,140.89 × 45,917.19
  4. Step 4: Simplify right side
    81,440.13x = 5,608,366,452.90
  5. Step 5: Solve for x
    x = 5,608,366,452.90/81,440.13
  6. Step 6: Final answer
    x = 68,864.90

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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.