Home / 99,647,935.30-149,471,902.95-85,777,325.20

Finding the Fourth Proportional to 99,647,935.30, 149,471,902.95 and 85,777,325.20

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Solution

The fourth proportional to 99,647,935.30, 149,471,902.95 and 85,777,325.20 is: 128,665,987.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,647,935.30 : 149,471,902.95 = 85,777,325.20 : x
  2. Step 2: Convert to fraction form
    99,647,935.30/149,471,902.95 = 85,777,325.20/x
  3. Step 3: Cross multiply
    99,647,935.30x = 149,471,902.95 × 85,777,325.20
  4. Step 4: Simplify right side
    99,647,935.30x = 12,821,300,027,604,988
  5. Step 5: Solve for x
    x = 12,821,300,027,604,988/99,647,935.30
  6. Step 6: Final answer
    x = 128,665,987.80

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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.