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Finding the Fourth Proportional to 139,969,171.80, 209,953,757.70 and 123,529,930.20

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Solution

The fourth proportional to 139,969,171.80, 209,953,757.70 and 123,529,930.20 is: 185,294,895.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,969,171.80 : 209,953,757.70 = 123,529,930.20 : x
  2. Step 2: Convert to fraction form
    139,969,171.80/209,953,757.70 = 123,529,930.20/x
  3. Step 3: Cross multiply
    139,969,171.80x = 209,953,757.70 × 123,529,930.20
  4. Step 4: Simplify right side
    139,969,171.80x = 25,935,573,033,908,712
  5. Step 5: Solve for x
    x = 25,935,573,033,908,712/139,969,171.80
  6. Step 6: Final answer
    x = 185,294,895.30

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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.