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Finding the Fourth Proportional to 126,891, 190,345.44 and 50,989.60

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Solution

The fourth proportional to 126,891, 190,345.44 and 50,989.60 is: 76,487.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,891 : 190,345.44 = 50,989.60 : x
  2. Step 2: Convert to fraction form
    126,891/190,345.44 = 50,989.60/x
  3. Step 3: Cross multiply
    126,891x = 190,345.44 × 50,989.60
  4. Step 4: Simplify right side
    126,891x = 9,705,637,847.42
  5. Step 5: Solve for x
    x = 9,705,637,847.42/126,891
  6. Step 6: Final answer
    x = 76,487.99

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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.