Home / 87,311.80-120,490.77-51,015.38

Finding the Fourth Proportional to 87,311.80, 120,490.77 and 51,015.38

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Solution

The fourth proportional to 87,311.80, 120,490.77 and 51,015.38 is: 70,401.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,311.80 : 120,490.77 = 51,015.38 : x
  2. Step 2: Convert to fraction form
    87,311.80/120,490.77 = 51,015.38/x
  3. Step 3: Cross multiply
    87,311.80x = 120,490.77 × 51,015.38
  4. Step 4: Simplify right side
    87,311.80x = 6,146,882,418.04
  5. Step 5: Solve for x
    x = 6,146,882,418.04/87,311.80
  6. Step 6: Final answer
    x = 70,401.51

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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.