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Finding the Fourth Proportional to 121,789.84, 182,850.44 and 68,519.30

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Solution

The fourth proportional to 121,789.84, 182,850.44 and 68,519.30 is: 102,872.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,789.84 : 182,850.44 = 68,519.30 : x
  2. Step 2: Convert to fraction form
    121,789.84/182,850.44 = 68,519.30/x
  3. Step 3: Cross multiply
    121,789.84x = 182,850.44 × 68,519.30
  4. Step 4: Simplify right side
    121,789.84x = 12,528,784,153.49
  5. Step 5: Solve for x
    x = 12,528,784,153.49/121,789.84
  6. Step 6: Final answer
    x = 102,872.16

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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.