Home / 81,868.08-122,730.30-67,943.64

Finding the Fourth Proportional to 81,868.08, 122,730.30 and 67,943.64

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Solution

The fourth proportional to 81,868.08, 122,730.30 and 67,943.64 is: 101,855.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,868.08 : 122,730.30 = 67,943.64 : x
  2. Step 2: Convert to fraction form
    81,868.08/122,730.30 = 67,943.64/x
  3. Step 3: Cross multiply
    81,868.08x = 122,730.30 × 67,943.64
  4. Step 4: Simplify right side
    81,868.08x = 8,338,743,320.29
  5. Step 5: Solve for x
    x = 8,338,743,320.29/81,868.08
  6. Step 6: Final answer
    x = 101,855.86

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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.