Home / 87,678.09-131,470.11-45,515.70

Finding the Fourth Proportional to 87,678.09, 131,470.11 and 45,515.70

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Solution

The fourth proportional to 87,678.09, 131,470.11 and 45,515.70 is: 68,249.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,678.09 : 131,470.11 = 45,515.70 : x
  2. Step 2: Convert to fraction form
    87,678.09/131,470.11 = 45,515.70/x
  3. Step 3: Cross multiply
    87,678.09x = 131,470.11 × 45,515.70
  4. Step 4: Simplify right side
    87,678.09x = 5,983,954,085.73
  5. Step 5: Solve for x
    x = 5,983,954,085.73/87,678.09
  6. Step 6: Final answer
    x = 68,249.14

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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.