Home / 121,760.96-168,137.16-76,517.60

Finding the Fourth Proportional to 121,760.96, 168,137.16 and 76,517.60

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Solution

The fourth proportional to 121,760.96, 168,137.16 and 76,517.60 is: 105,661.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,760.96 : 168,137.16 = 76,517.60 : x
  2. Step 2: Convert to fraction form
    121,760.96/168,137.16 = 76,517.60/x
  3. Step 3: Cross multiply
    121,760.96x = 168,137.16 × 76,517.60
  4. Step 4: Simplify right side
    121,760.96x = 12,865,451,954.02
  5. Step 5: Solve for x
    x = 12,865,451,954.02/121,760.96
  6. Step 6: Final answer
    x = 105,661.55

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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.