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Finding the Fourth Proportional to 133,099.70, 199,649.55 and 91,109.30

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Solution

The fourth proportional to 133,099.70, 199,649.55 and 91,109.30 is: 136,663.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,099.70 : 199,649.55 = 91,109.30 : x
  2. Step 2: Convert to fraction form
    133,099.70/199,649.55 = 91,109.30/x
  3. Step 3: Cross multiply
    133,099.70x = 199,649.55 × 91,109.30
  4. Step 4: Simplify right side
    133,099.70x = 18,189,930,745.82
  5. Step 5: Solve for x
    x = 18,189,930,745.82/133,099.70
  6. Step 6: Final answer
    x = 136,663.95

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1.5x scale

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.