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Finding the Fourth Proportional to 201,204,906.30, 301,807,359.45 and 139,982,903.10

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Solution

The fourth proportional to 201,204,906.30, 301,807,359.45 and 139,982,903.10 is: 209,974,354.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,204,906.30 : 301,807,359.45 = 139,982,903.10 : x
  2. Step 2: Convert to fraction form
    201,204,906.30/301,807,359.45 = 139,982,903.10/x
  3. Step 3: Cross multiply
    201,204,906.30x = 301,807,359.45 × 139,982,903.10
  4. Step 4: Simplify right side
    201,204,906.30x = 42,247,870,352,756,216
  5. Step 5: Solve for x
    x = 42,247,870,352,756,216/201,204,906.30
  6. Step 6: Final answer
    x = 209,974,354.65

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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.