Home / 87,020.31-120,085.70-51,212.43

Finding the Fourth Proportional to 87,020.31, 120,085.70 and 51,212.43

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Solution

The fourth proportional to 87,020.31, 120,085.70 and 51,212.43 is: 70,671.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,020.31 : 120,085.70 = 51,212.43 : x
  2. Step 2: Convert to fraction form
    87,020.31/120,085.70 = 51,212.43/x
  3. Step 3: Cross multiply
    87,020.31x = 120,085.70 × 51,212.43
  4. Step 4: Simplify right side
    87,020.31x = 6,149,880,249.19
  5. Step 5: Solve for x
    x = 6,149,880,249.19/87,020.31
  6. Step 6: Final answer
    x = 70,671.78

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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.