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Finding the Fourth Proportional to 139,968,313.20, 209,952,469.80 and 49,101,087.60

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Solution

The fourth proportional to 139,968,313.20, 209,952,469.80 and 49,101,087.60 is: 73,651,631.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,313.20 : 209,952,469.80 = 49,101,087.60 : x
  2. Step 2: Convert to fraction form
    139,968,313.20/209,952,469.80 = 49,101,087.60/x
  3. Step 3: Cross multiply
    139,968,313.20x = 209,952,469.80 × 49,101,087.60
  4. Step 4: Simplify right side
    139,968,313.20x = 10,308,894,611,486,156
  5. Step 5: Solve for x
    x = 10,308,894,611,486,156/139,968,313.20
  6. Step 6: Final answer
    x = 73,651,631.40

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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.