Home / 120,027.12-165,640.77-66,315.60

Finding the Fourth Proportional to 120,027.12, 165,640.77 and 66,315.60

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Solution

The fourth proportional to 120,027.12, 165,640.77 and 66,315.60 is: 91,517.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,027.12 : 165,640.77 = 66,315.60 : x
  2. Step 2: Convert to fraction form
    120,027.12/165,640.77 = 66,315.60/x
  3. Step 3: Cross multiply
    120,027.12x = 165,640.77 × 66,315.60
  4. Step 4: Simplify right side
    120,027.12x = 10,984,567,047.01
  5. Step 5: Solve for x
    x = 10,984,567,047.01/120,027.12
  6. Step 6: Final answer
    x = 91,517.38

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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.