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Finding the Fourth Proportional to 272,712.11, 409,112.46 and 80,606.03

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Solution

The fourth proportional to 272,712.11, 409,112.46 and 80,606.03 is: 120,922.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,712.11 : 409,112.46 = 80,606.03 : x
  2. Step 2: Convert to fraction form
    272,712.11/409,112.46 = 80,606.03/x
  3. Step 3: Cross multiply
    272,712.11x = 409,112.46 × 80,606.03
  4. Step 4: Simplify right side
    272,712.11x = 32,976,929,178.57
  5. Step 5: Solve for x
    x = 32,976,929,178.57/272,712.11
  6. Step 6: Final answer
    x = 120,922.13

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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.