Home / 426,150.23-639,114.78-126,560.39

Finding the Fourth Proportional to 426,150.23, 639,114.78 and 126,560.39

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Solution

The fourth proportional to 426,150.23, 639,114.78 and 126,560.39 is: 189,807.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,150.23 : 639,114.78 = 126,560.39 : x
  2. Step 2: Convert to fraction form
    426,150.23/639,114.78 = 126,560.39/x
  3. Step 3: Cross multiply
    426,150.23x = 639,114.78 × 126,560.39
  4. Step 4: Simplify right side
    426,150.23x = 80,886,615,811.56
  5. Step 5: Solve for x
    x = 80,886,615,811.56/426,150.23
  6. Step 6: Final answer
    x = 189,807.75

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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.