Home / 87,108.84-120,451.32-69,172.20

Finding the Fourth Proportional to 87,108.84, 120,451.32 and 69,172.20

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Solution

The fourth proportional to 87,108.84, 120,451.32 and 69,172.20 is: 95,649.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,108.84 : 120,451.32 = 69,172.20 : x
  2. Step 2: Convert to fraction form
    87,108.84/120,451.32 = 69,172.20/x
  3. Step 3: Cross multiply
    87,108.84x = 120,451.32 × 69,172.20
  4. Step 4: Simplify right side
    87,108.84x = 8,331,882,797.30
  5. Step 5: Solve for x
    x = 8,331,882,797.30/87,108.84
  6. Step 6: Final answer
    x = 95,649.11

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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.