Home / 87,977.12-131,968.20-31,822.40

Finding the Fourth Proportional to 87,977.12, 131,968.20 and 31,822.40

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Solution

The fourth proportional to 87,977.12, 131,968.20 and 31,822.40 is: 47,734.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,977.12 : 131,968.20 = 31,822.40 : x
  2. Step 2: Convert to fraction form
    87,977.12/131,968.20 = 31,822.40/x
  3. Step 3: Cross multiply
    87,977.12x = 131,968.20 × 31,822.40
  4. Step 4: Simplify right side
    87,977.12x = 4,199,544,847.68
  5. Step 5: Solve for x
    x = 4,199,544,847.68/87,977.12
  6. Step 6: Final answer
    x = 47,734.51

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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.