Home / 87,820.48-131,731.05-21,260.49

Finding the Fourth Proportional to 87,820.48, 131,731.05 and 21,260.49

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Solution

The fourth proportional to 87,820.48, 131,731.05 and 21,260.49 is: 31,890.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,820.48 : 131,731.05 = 21,260.49 : x
  2. Step 2: Convert to fraction form
    87,820.48/131,731.05 = 21,260.49/x
  3. Step 3: Cross multiply
    87,820.48x = 131,731.05 × 21,260.49
  4. Step 4: Simplify right side
    87,820.48x = 2,800,666,671.21
  5. Step 5: Solve for x
    x = 2,800,666,671.21/87,820.48
  6. Step 6: Final answer
    x = 31,890.81

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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.