Home / 80,472.13-120,712.81-21,306.26

Finding the Fourth Proportional to 80,472.13, 120,712.81 and 21,306.26

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Solution

The fourth proportional to 80,472.13, 120,712.81 and 21,306.26 is: 31,960.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,472.13 : 120,712.81 = 21,306.26 : x
  2. Step 2: Convert to fraction form
    80,472.13/120,712.81 = 21,306.26/x
  3. Step 3: Cross multiply
    80,472.13x = 120,712.81 × 21,306.26
  4. Step 4: Simplify right side
    80,472.13x = 2,571,938,408.66
  5. Step 5: Solve for x
    x = 2,571,938,408.66/80,472.13
  6. Step 6: Final answer
    x = 31,960.61

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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.