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Finding the Fourth Proportional to 133,086.20, 199,629.30 and 69,881.90

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Solution

The fourth proportional to 133,086.20, 199,629.30 and 69,881.90 is: 104,822.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,086.20 : 199,629.30 = 69,881.90 : x
  2. Step 2: Convert to fraction form
    133,086.20/199,629.30 = 69,881.90/x
  3. Step 3: Cross multiply
    133,086.20x = 199,629.30 × 69,881.90
  4. Step 4: Simplify right side
    133,086.20x = 13,950,474,779.67
  5. Step 5: Solve for x
    x = 13,950,474,779.67/133,086.20
  6. Step 6: Final answer
    x = 104,822.85

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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.