Home / 120,039.80-165,640.62-66,321.56

Finding the Fourth Proportional to 120,039.80, 165,640.62 and 66,321.56

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Solution

The fourth proportional to 120,039.80, 165,640.62 and 66,321.56 is: 91,515.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,039.80 : 165,640.62 = 66,321.56 : x
  2. Step 2: Convert to fraction form
    120,039.80/165,640.62 = 66,321.56/x
  3. Step 3: Cross multiply
    120,039.80x = 165,640.62 × 66,321.56
  4. Step 4: Simplify right side
    120,039.80x = 10,985,544,317.77
  5. Step 5: Solve for x
    x = 10,985,544,317.77/120,039.80
  6. Step 6: Final answer
    x = 91,515.85

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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.