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Finding the Fourth Proportional to 139,969,343.20, 209,954,014.80 and 63,294,872.80

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Solution

The fourth proportional to 139,969,343.20, 209,954,014.80 and 63,294,872.80 is: 94,942,309.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,969,343.20 : 209,954,014.80 = 63,294,872.80 : x
  2. Step 2: Convert to fraction form
    139,969,343.20/209,954,014.80 = 63,294,872.80/x
  3. Step 3: Cross multiply
    139,969,343.20x = 209,954,014.80 × 63,294,872.80
  4. Step 4: Simplify right side
    139,969,343.20x = 13,289,012,660,615,318
  5. Step 5: Solve for x
    x = 13,289,012,660,615,318/139,969,343.20
  6. Step 6: Final answer
    x = 94,942,309.20

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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.