Home / 209,943.75-289,640.13-129,231.15

Finding the Fourth Proportional to 209,943.75, 289,640.13 and 129,231.15

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Solution

The fourth proportional to 209,943.75, 289,640.13 and 129,231.15 is: 178,288.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,943.75 : 289,640.13 = 129,231.15 : x
  2. Step 2: Convert to fraction form
    209,943.75/289,640.13 = 129,231.15/x
  3. Step 3: Cross multiply
    209,943.75x = 289,640.13 × 129,231.15
  4. Step 4: Simplify right side
    209,943.75x = 37,430,527,086.05
  5. Step 5: Solve for x
    x = 37,430,527,086.05/209,943.75
  6. Step 6: Final answer
    x = 178,288.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.