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Finding the Fourth Proportional to 87,112.96, 120,217.12 and 65,270.56

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Solution

The fourth proportional to 87,112.96, 120,217.12 and 65,270.56 is: 90,074.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,112.96 : 120,217.12 = 65,270.56 : x
  2. Step 2: Convert to fraction form
    87,112.96/120,217.12 = 65,270.56/x
  3. Step 3: Cross multiply
    87,112.96x = 120,217.12 × 65,270.56
  4. Step 4: Simplify right side
    87,112.96x = 7,846,638,743.99
  5. Step 5: Solve for x
    x = 7,846,638,743.99/87,112.96
  6. Step 6: Final answer
    x = 90,074.30

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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.