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Finding the Fourth Proportional to 139,969,179.80, 209,953,769.70 and 127,204,098.20

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Solution

The fourth proportional to 139,969,179.80, 209,953,769.70 and 127,204,098.20 is: 190,806,147.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,969,179.80 : 209,953,769.70 = 127,204,098.20 : x
  2. Step 2: Convert to fraction form
    139,969,179.80/209,953,769.70 = 127,204,098.20/x
  3. Step 3: Cross multiply
    139,969,179.80x = 209,953,769.70 × 127,204,098.20
  4. Step 4: Simplify right side
    139,969,179.80x = 26,706,979,938,378,984
  5. Step 5: Solve for x
    x = 26,706,979,938,378,984/139,969,179.80
  6. Step 6: Final answer
    x = 190,806,147.30

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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.