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Finding the Fourth Proportional to 126,571.92, 190,004.60 and 74,019.12

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Solution

The fourth proportional to 126,571.92, 190,004.60 and 74,019.12 is: 111,114.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,571.92 : 190,004.60 = 74,019.12 : x
  2. Step 2: Convert to fraction form
    126,571.92/190,004.60 = 74,019.12/x
  3. Step 3: Cross multiply
    126,571.92x = 190,004.60 × 74,019.12
  4. Step 4: Simplify right side
    126,571.92x = 14,063,973,287.95
  5. Step 5: Solve for x
    x = 14,063,973,287.95/126,571.92
  6. Step 6: Final answer
    x = 111,114.48

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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.