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Finding the Fourth Proportional to 80,642,603.80, 120,963,905.70 and 29,526,290.20

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Solution

The fourth proportional to 80,642,603.80, 120,963,905.70 and 29,526,290.20 is: 44,289,435.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,642,603.80 : 120,963,905.70 = 29,526,290.20 : x
  2. Step 2: Convert to fraction form
    80,642,603.80/120,963,905.70 = 29,526,290.20/x
  3. Step 3: Cross multiply
    80,642,603.80x = 120,963,905.70 × 29,526,290.20
  4. Step 4: Simplify right side
    80,642,603.80x = 3,571,615,383,423,634
  5. Step 5: Solve for x
    x = 3,571,615,383,423,634/80,642,603.80
  6. Step 6: Final answer
    x = 44,289,435.30

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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.