Home / 87,818.48-131,728.05-21,258.49

Finding the Fourth Proportional to 87,818.48, 131,728.05 and 21,258.49

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Solution

The fourth proportional to 87,818.48, 131,728.05 and 21,258.49 is: 31,887.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,818.48 : 131,728.05 = 21,258.49 : x
  2. Step 2: Convert to fraction form
    87,818.48/131,728.05 = 21,258.49/x
  3. Step 3: Cross multiply
    87,818.48x = 131,728.05 × 21,258.49
  4. Step 4: Simplify right side
    87,818.48x = 2,800,339,433.64
  5. Step 5: Solve for x
    x = 2,800,339,433.64/87,818.48
  6. Step 6: Final answer
    x = 31,887.81

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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.