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Finding the Fourth Proportional to 139,968,375.60, 209,952,563.40 and 129,764,708.40

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Solution

The fourth proportional to 139,968,375.60, 209,952,563.40 and 129,764,708.40 is: 194,647,062.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,375.60 : 209,952,563.40 = 129,764,708.40 : x
  2. Step 2: Convert to fraction form
    139,968,375.60/209,952,563.40 = 129,764,708.40/x
  3. Step 3: Cross multiply
    139,968,375.60x = 209,952,563.40 × 129,764,708.40
  4. Step 4: Simplify right side
    139,968,375.60x = 27,244,433,167,433,516
  5. Step 5: Solve for x
    x = 27,244,433,167,433,516/139,968,375.60
  6. Step 6: Final answer
    x = 194,647,062.60

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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.