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Finding the Fourth Proportional to 120,202.70, 165,868.59 and 66,486.56

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Solution

The fourth proportional to 120,202.70, 165,868.59 and 66,486.56 is: 91,745.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,202.70 : 165,868.59 = 66,486.56 : x
  2. Step 2: Convert to fraction form
    120,202.70/165,868.59 = 66,486.56/x
  3. Step 3: Cross multiply
    120,202.70x = 165,868.59 × 66,486.56
  4. Step 4: Simplify right side
    120,202.70x = 11,028,031,961.15
  5. Step 5: Solve for x
    x = 11,028,031,961.15/120,202.70
  6. Step 6: Final answer
    x = 91,745.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.