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Finding the Fourth Proportional to 143,868, 198,535.56 and 80,209.68

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Solution

The fourth proportional to 143,868, 198,535.56 and 80,209.68 is: 110,688.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,868 : 198,535.56 = 80,209.68 : x
  2. Step 2: Convert to fraction form
    143,868/198,535.56 = 80,209.68/x
  3. Step 3: Cross multiply
    143,868x = 198,535.56 × 80,209.68
  4. Step 4: Simplify right side
    143,868x = 15,924,473,736.22
  5. Step 5: Solve for x
    x = 15,924,473,736.22/143,868
  6. Step 6: Final answer
    x = 110,688.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.