Home / 81,790.20-122,685.30-68,668.20

Finding the Fourth Proportional to 81,790.20, 122,685.30 and 68,668.20

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Solution

The fourth proportional to 81,790.20, 122,685.30 and 68,668.20 is: 103,002.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,790.20 : 122,685.30 = 68,668.20 : x
  2. Step 2: Convert to fraction form
    81,790.20/122,685.30 = 68,668.20/x
  3. Step 3: Cross multiply
    81,790.20x = 122,685.30 × 68,668.20
  4. Step 4: Simplify right side
    81,790.20x = 8,424,578,717.46
  5. Step 5: Solve for x
    x = 8,424,578,717.46/81,790.20
  6. Step 6: Final answer
    x = 103,002.30

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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.