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Finding the Fourth Proportional to 7,859,969.88, 11,789,954.82 and 2,180,194.20

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Solution

The fourth proportional to 7,859,969.88, 11,789,954.82 and 2,180,194.20 is: 3,270,291.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,859,969.88 : 11,789,954.82 = 2,180,194.20 : x
  2. Step 2: Convert to fraction form
    7,859,969.88/11,789,954.82 = 2,180,194.20/x
  3. Step 3: Cross multiply
    7,859,969.88x = 11,789,954.82 × 2,180,194.20
  4. Step 4: Simplify right side
    7,859,969.88x = 25,704,391,116,826.05
  5. Step 5: Solve for x
    x = 25,704,391,116,826.05/7,859,969.88
  6. Step 6: Final answer
    x = 3,270,291.30

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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.