Home / 87,975.12-131,965.20-31,820.40

Finding the Fourth Proportional to 87,975.12, 131,965.20 and 31,820.40

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Solution

The fourth proportional to 87,975.12, 131,965.20 and 31,820.40 is: 47,731.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,975.12 : 131,965.20 = 31,820.40 : x
  2. Step 2: Convert to fraction form
    87,975.12/131,965.20 = 31,820.40/x
  3. Step 3: Cross multiply
    87,975.12x = 131,965.20 × 31,820.40
  4. Step 4: Simplify right side
    87,975.12x = 4,199,185,450.08
  5. Step 5: Solve for x
    x = 4,199,185,450.08/87,975.12
  6. Step 6: Final answer
    x = 47,731.51

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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.