Home / 278,812.11-418,216.32-79,132.62

Finding the Fourth Proportional to 278,812.11, 418,216.32 and 79,132.62

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Solution

The fourth proportional to 278,812.11, 418,216.32 and 79,132.62 is: 118,698.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,812.11 : 418,216.32 = 79,132.62 : x
  2. Step 2: Convert to fraction form
    278,812.11/418,216.32 = 79,132.62/x
  3. Step 3: Cross multiply
    278,812.11x = 418,216.32 × 79,132.62
  4. Step 4: Simplify right side
    278,812.11x = 33,094,553,128.36
  5. Step 5: Solve for x
    x = 33,094,553,128.36/278,812.11
  6. Step 6: Final answer
    x = 118,698.41

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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.