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Finding the Fourth Proportional to 87,657.85, 131,486.78 and 31,524.85

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Solution

The fourth proportional to 87,657.85, 131,486.78 and 31,524.85 is: 47,287.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,657.85 : 131,486.78 = 31,524.85 : x
  2. Step 2: Convert to fraction form
    87,657.85/131,486.78 = 31,524.85/x
  3. Step 3: Cross multiply
    87,657.85x = 131,486.78 × 31,524.85
  4. Step 4: Simplify right side
    87,657.85x = 4,145,100,858.86
  5. Step 5: Solve for x
    x = 4,145,100,858.86/87,657.85
  6. Step 6: Final answer
    x = 47,287.28

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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.