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Finding the Fourth Proportional to 206,141.40, 309,212.10 and 161,904.60

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Solution

The fourth proportional to 206,141.40, 309,212.10 and 161,904.60 is: 242,856.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,141.40 : 309,212.10 = 161,904.60 : x
  2. Step 2: Convert to fraction form
    206,141.40/309,212.10 = 161,904.60/x
  3. Step 3: Cross multiply
    206,141.40x = 309,212.10 × 161,904.60
  4. Step 4: Simplify right side
    206,141.40x = 50,062,861,365.66
  5. Step 5: Solve for x
    x = 50,062,861,365.66/206,141.40
  6. Step 6: Final answer
    x = 242,856.90

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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.