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Finding the Fourth Proportional to 87,334.40, 131,001.60 and 80,919.20

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Solution

The fourth proportional to 87,334.40, 131,001.60 and 80,919.20 is: 121,378.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,334.40 : 131,001.60 = 80,919.20 : x
  2. Step 2: Convert to fraction form
    87,334.40/131,001.60 = 80,919.20/x
  3. Step 3: Cross multiply
    87,334.40x = 131,001.60 × 80,919.20
  4. Step 4: Simplify right side
    87,334.40x = 10,600,544,670.72
  5. Step 5: Solve for x
    x = 10,600,544,670.72/87,334.40
  6. Step 6: Final answer
    x = 121,378.80

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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.