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Finding the Fourth Proportional to 259,021.91, 387,815.45 and 132,389.46

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Solution

The fourth proportional to 259,021.91, 387,815.45 and 132,389.46 is: 198,217.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,021.91 : 387,815.45 = 132,389.46 : x
  2. Step 2: Convert to fraction form
    259,021.91/387,815.45 = 132,389.46/x
  3. Step 3: Cross multiply
    259,021.91x = 387,815.45 × 132,389.46
  4. Step 4: Simplify right side
    259,021.91x = 51,342,677,343.21
  5. Step 5: Solve for x
    x = 51,342,677,343.21/259,021.91
  6. Step 6: Final answer
    x = 198,217.51

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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.