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Finding the Fourth Proportional to 139,969,892.70, 209,954,839.05 and 123,341,694.30

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Solution

The fourth proportional to 139,969,892.70, 209,954,839.05 and 123,341,694.30 is: 185,012,541.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,969,892.70 : 209,954,839.05 = 123,341,694.30 : x
  2. Step 2: Convert to fraction form
    139,969,892.70/209,954,839.05 = 123,341,694.30/x
  3. Step 3: Cross multiply
    139,969,892.70x = 209,954,839.05 × 123,341,694.30
  4. Step 4: Simplify right side
    139,969,892.70x = 25,896,185,574,910,804
  5. Step 5: Solve for x
    x = 25,896,185,574,910,804/139,969,892.70
  6. Step 6: Final answer
    x = 185,012,541.45

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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.