Home / 87,199.68-120,334.40-51,391.20

Finding the Fourth Proportional to 87,199.68, 120,334.40 and 51,391.20

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Solution

The fourth proportional to 87,199.68, 120,334.40 and 51,391.20 is: 70,919.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,199.68 : 120,334.40 = 51,391.20 : x
  2. Step 2: Convert to fraction form
    87,199.68/120,334.40 = 51,391.20/x
  3. Step 3: Cross multiply
    87,199.68x = 120,334.40 × 51,391.20
  4. Step 4: Simplify right side
    87,199.68x = 6,184,129,217.28
  5. Step 5: Solve for x
    x = 6,184,129,217.28/87,199.68
  6. Step 6: Final answer
    x = 70,919.17

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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.