Home / 81,743.80-122,453.70-72,002.20

Finding the Fourth Proportional to 81,743.80, 122,453.70 and 72,002.20

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Solution

The fourth proportional to 81,743.80, 122,453.70 and 72,002.20 is: 107,860.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,743.80 : 122,453.70 = 72,002.20 : x
  2. Step 2: Convert to fraction form
    81,743.80/122,453.70 = 72,002.20/x
  3. Step 3: Cross multiply
    81,743.80x = 122,453.70 × 72,002.20
  4. Step 4: Simplify right side
    81,743.80x = 8,816,935,798.14
  5. Step 5: Solve for x
    x = 8,816,935,798.14/81,743.80
  6. Step 6: Final answer
    x = 107,860.61

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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.