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Finding the Fourth Proportional to 250,711.05, 345,979.22 and 135,989.40

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Solution

The fourth proportional to 250,711.05, 345,979.22 and 135,989.40 is: 187,664.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    250,711.05 : 345,979.22 = 135,989.40 : x
  2. Step 2: Convert to fraction form
    250,711.05/345,979.22 = 135,989.40/x
  3. Step 3: Cross multiply
    250,711.05x = 345,979.22 × 135,989.40
  4. Step 4: Simplify right side
    250,711.05x = 47,049,505,860.32
  5. Step 5: Solve for x
    x = 47,049,505,860.32/250,711.05
  6. Step 6: Final answer
    x = 187,664.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.