Home / 87,839.58-131,758.94-21,279.72

Finding the Fourth Proportional to 87,839.58, 131,758.94 and 21,279.72

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Solution

The fourth proportional to 87,839.58, 131,758.94 and 21,279.72 is: 31,919.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,839.58 : 131,758.94 = 21,279.72 : x
  2. Step 2: Convert to fraction form
    87,839.58/131,758.94 = 21,279.72/x
  3. Step 3: Cross multiply
    87,839.58x = 131,758.94 × 21,279.72
  4. Step 4: Simplify right side
    87,839.58x = 2,803,792,585.50
  5. Step 5: Solve for x
    x = 2,803,792,585.50/87,839.58
  6. Step 6: Final answer
    x = 31,919.47

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1.5x scale

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.