Home / 259,921.28-389,895.69-72,947.36

Finding the Fourth Proportional to 259,921.28, 389,895.69 and 72,947.36

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Solution

The fourth proportional to 259,921.28, 389,895.69 and 72,947.36 is: 109,424.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,921.28 : 389,895.69 = 72,947.36 : x
  2. Step 2: Convert to fraction form
    259,921.28/389,895.69 = 72,947.36/x
  3. Step 3: Cross multiply
    259,921.28x = 389,895.69 × 72,947.36
  4. Step 4: Simplify right side
    259,921.28x = 28,441,861,260.88
  5. Step 5: Solve for x
    x = 28,441,861,260.88/259,921.28
  6. Step 6: Final answer
    x = 109,424.90

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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.