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Finding the Fourth Proportional to 200,809,958.80, 301,214,938.20 and 139,587,955.60

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Solution

The fourth proportional to 200,809,958.80, 301,214,938.20 and 139,587,955.60 is: 209,381,933.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,809,958.80 : 301,214,938.20 = 139,587,955.60 : x
  2. Step 2: Convert to fraction form
    200,809,958.80/301,214,938.20 = 139,587,955.60/x
  3. Step 3: Cross multiply
    200,809,958.80x = 301,214,938.20 × 139,587,955.60
  4. Step 4: Simplify right side
    200,809,958.80x = 42,045,977,419,518,344
  5. Step 5: Solve for x
    x = 42,045,977,419,518,344/200,809,958.80
  6. Step 6: Final answer
    x = 209,381,933.40

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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.