Home / 87,820.20-131,730.63-21,260.22

Finding the Fourth Proportional to 87,820.20, 131,730.63 and 21,260.22

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Solution

The fourth proportional to 87,820.20, 131,730.63 and 21,260.22 is: 31,890.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,820.20 : 131,730.63 = 21,260.22 : x
  2. Step 2: Convert to fraction form
    87,820.20/131,730.63 = 21,260.22/x
  3. Step 3: Cross multiply
    87,820.20x = 131,730.63 × 21,260.22
  4. Step 4: Simplify right side
    87,820.20x = 2,800,622,174.54
  5. Step 5: Solve for x
    x = 2,800,622,174.54/87,820.20
  6. Step 6: Final answer
    x = 31,890.41

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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.