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Finding the Fourth Proportional to 99,647,687.70, 149,471,531.55 and 86,016,226.05

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Solution

The fourth proportional to 99,647,687.70, 149,471,531.55 and 86,016,226.05 is: 129,024,339.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,647,687.70 : 149,471,531.55 = 86,016,226.05 : x
  2. Step 2: Convert to fraction form
    99,647,687.70/149,471,531.55 = 86,016,226.05/x
  3. Step 3: Cross multiply
    99,647,687.70x = 149,471,531.55 × 86,016,226.05
  4. Step 4: Simplify right side
    99,647,687.70x = 12,856,977,045,844,508
  5. Step 5: Solve for x
    x = 12,856,977,045,844,508/99,647,687.70
  6. Step 6: Final answer
    x = 129,024,339.08

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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.