Home / 121,512.40-182,268.60-91,987.90

Finding the Fourth Proportional to 121,512.40, 182,268.60 and 91,987.90

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Solution

The fourth proportional to 121,512.40, 182,268.60 and 91,987.90 is: 137,981.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,512.40 : 182,268.60 = 91,987.90 : x
  2. Step 2: Convert to fraction form
    121,512.40/182,268.60 = 91,987.90/x
  3. Step 3: Cross multiply
    121,512.40x = 182,268.60 × 91,987.90
  4. Step 4: Simplify right side
    121,512.40x = 16,766,505,749.94
  5. Step 5: Solve for x
    x = 16,766,505,749.94/121,512.40
  6. Step 6: Final answer
    x = 137,981.85

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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.