Home / 87,218.10-120,329.82-57,020.76

Finding the Fourth Proportional to 87,218.10, 120,329.82 and 57,020.76

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Solution

The fourth proportional to 87,218.10, 120,329.82 and 57,020.76 is: 78,668.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,218.10 : 120,329.82 = 57,020.76 : x
  2. Step 2: Convert to fraction form
    87,218.10/120,329.82 = 57,020.76/x
  3. Step 3: Cross multiply
    87,218.10x = 120,329.82 × 57,020.76
  4. Step 4: Simplify right side
    87,218.10x = 6,861,297,787.06
  5. Step 5: Solve for x
    x = 6,861,297,787.06/87,218.10
  6. Step 6: Final answer
    x = 78,668.28

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1.5x scale

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.