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Finding the Fourth Proportional to 200,008.60, 300,013.20 and 81,679.95

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Solution

The fourth proportional to 200,008.60, 300,013.20 and 81,679.95 is: 122,520.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,008.60 : 300,013.20 = 81,679.95 : x
  2. Step 2: Convert to fraction form
    200,008.60/300,013.20 = 81,679.95/x
  3. Step 3: Cross multiply
    200,008.60x = 300,013.20 × 81,679.95
  4. Step 4: Simplify right side
    200,008.60x = 24,505,062,766.94
  5. Step 5: Solve for x
    x = 24,505,062,766.94/200,008.60
  6. Step 6: Final answer
    x = 122,520.05

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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.