Home / 312,815.20-469,218.40-76,158.40

Finding the Fourth Proportional to 312,815.20, 469,218.40 and 76,158.40

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Solution

The fourth proportional to 312,815.20, 469,218.40 and 76,158.40 is: 114,236.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,815.20 : 469,218.40 = 76,158.40 : x
  2. Step 2: Convert to fraction form
    312,815.20/469,218.40 = 76,158.40/x
  3. Step 3: Cross multiply
    312,815.20x = 469,218.40 × 76,158.40
  4. Step 4: Simplify right side
    312,815.20x = 35,734,922,594.56
  5. Step 5: Solve for x
    x = 35,734,922,594.56/312,815.20
  6. Step 6: Final answer
    x = 114,236.53

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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.