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Finding the Fourth Proportional to 126,404.48, 189,470.64 and 67,180.48

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Solution

The fourth proportional to 126,404.48, 189,470.64 and 67,180.48 is: 100,698.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,404.48 : 189,470.64 = 67,180.48 : x
  2. Step 2: Convert to fraction form
    126,404.48/189,470.64 = 67,180.48/x
  3. Step 3: Cross multiply
    126,404.48x = 189,470.64 × 67,180.48
  4. Step 4: Simplify right side
    126,404.48x = 12,728,728,541.11
  5. Step 5: Solve for x
    x = 12,728,728,541.11/126,404.48
  6. Step 6: Final answer
    x = 100,698.40

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1.5x scale

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.