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Finding the Fourth Proportional to 139,969,904.20, 209,954,856.30 and 125,861,129.80

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Solution

The fourth proportional to 139,969,904.20, 209,954,856.30 and 125,861,129.80 is: 188,791,694.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,969,904.20 : 209,954,856.30 = 125,861,129.80 : x
  2. Step 2: Convert to fraction form
    139,969,904.20/209,954,856.30 = 125,861,129.80/x
  3. Step 3: Cross multiply
    139,969,904.20x = 209,954,856.30 × 125,861,129.80
  4. Step 4: Simplify right side
    139,969,904.20x = 26,425,155,420,914,648
  5. Step 5: Solve for x
    x = 26,425,155,420,914,648/139,969,904.20
  6. Step 6: Final answer
    x = 188,791,694.70

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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.