Home / 259,819.88-389,685.90-72,788.36

Finding the Fourth Proportional to 259,819.88, 389,685.90 and 72,788.36

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Solution

The fourth proportional to 259,819.88, 389,685.90 and 72,788.36 is: 109,170.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,819.88 : 389,685.90 = 72,788.36 : x
  2. Step 2: Convert to fraction form
    259,819.88/389,685.90 = 72,788.36/x
  3. Step 3: Cross multiply
    259,819.88x = 389,685.90 × 72,788.36
  4. Step 4: Simplify right side
    259,819.88x = 28,364,597,576.12
  5. Step 5: Solve for x
    x = 28,364,597,576.12/259,819.88
  6. Step 6: Final answer
    x = 109,170.24

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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.