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Finding the Fourth Proportional to 81,981.82, 122,990.02 and 26,573.50

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Solution

The fourth proportional to 81,981.82, 122,990.02 and 26,573.50 is: 39,865.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,981.82 : 122,990.02 = 26,573.50 : x
  2. Step 2: Convert to fraction form
    81,981.82/122,990.02 = 26,573.50/x
  3. Step 3: Cross multiply
    81,981.82x = 122,990.02 × 26,573.50
  4. Step 4: Simplify right side
    81,981.82x = 3,268,275,296.47
  5. Step 5: Solve for x
    x = 3,268,275,296.47/81,981.82
  6. Step 6: Final answer
    x = 39,865.85

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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.