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Finding the Fourth Proportional to 87,998.40, 131,997.60 and 40,613.40

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Solution

The fourth proportional to 87,998.40, 131,997.60 and 40,613.40 is: 60,920.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,998.40 : 131,997.60 = 40,613.40 : x
  2. Step 2: Convert to fraction form
    87,998.40/131,997.60 = 40,613.40/x
  3. Step 3: Cross multiply
    87,998.40x = 131,997.60 × 40,613.40
  4. Step 4: Simplify right side
    87,998.40x = 5,360,871,327.84
  5. Step 5: Solve for x
    x = 5,360,871,327.84/87,998.40
  6. Step 6: Final answer
    x = 60,920.10

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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.