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Finding the Fourth Proportional to 139,969,351.70, 209,954,027.55 and 127,428,218.90

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Solution

The fourth proportional to 139,969,351.70, 209,954,027.55 and 127,428,218.90 is: 191,142,328.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,969,351.70 : 209,954,027.55 = 127,428,218.90 : x
  2. Step 2: Convert to fraction form
    139,969,351.70/209,954,027.55 = 127,428,218.90/x
  3. Step 3: Cross multiply
    139,969,351.70x = 209,954,027.55 × 127,428,218.90
  4. Step 4: Simplify right side
    139,969,351.70x = 26,754,067,781,578,032
  5. Step 5: Solve for x
    x = 26,754,067,781,578,032/139,969,351.70
  6. Step 6: Final answer
    x = 191,142,328.35

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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.