Home / 81,694.20-122,541.30-68,572.20

Finding the Fourth Proportional to 81,694.20, 122,541.30 and 68,572.20

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Solution

The fourth proportional to 81,694.20, 122,541.30 and 68,572.20 is: 102,858.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,694.20 : 122,541.30 = 68,572.20 : x
  2. Step 2: Convert to fraction form
    81,694.20/122,541.30 = 68,572.20/x
  3. Step 3: Cross multiply
    81,694.20x = 122,541.30 × 68,572.20
  4. Step 4: Simplify right side
    81,694.20x = 8,402,926,531.86
  5. Step 5: Solve for x
    x = 8,402,926,531.86/81,694.20
  6. Step 6: Final answer
    x = 102,858.30

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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.