Home / 99,647,928.80-149,471,893.20-85,777,318.70

Finding the Fourth Proportional to 99,647,928.80, 149,471,893.20 and 85,777,318.70

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Solution

The fourth proportional to 99,647,928.80, 149,471,893.20 and 85,777,318.70 is: 128,665,978.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,647,928.80 : 149,471,893.20 = 85,777,318.70 : x
  2. Step 2: Convert to fraction form
    99,647,928.80/149,471,893.20 = 85,777,318.70/x
  3. Step 3: Cross multiply
    99,647,928.80x = 149,471,893.20 × 85,777,318.70
  4. Step 4: Simplify right side
    99,647,928.80x = 12,821,298,219,708,762
  5. Step 5: Solve for x
    x = 12,821,298,219,708,762/99,647,928.80
  6. Step 6: Final answer
    x = 128,665,978.05

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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.