Home / 80,778.28-121,127.18-51,173.60

Finding the Fourth Proportional to 80,778.28, 121,127.18 and 51,173.60

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Solution

The fourth proportional to 80,778.28, 121,127.18 and 51,173.60 is: 76,734.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,778.28 : 121,127.18 = 51,173.60 : x
  2. Step 2: Convert to fraction form
    80,778.28/121,127.18 = 51,173.60/x
  3. Step 3: Cross multiply
    80,778.28x = 121,127.18 × 51,173.60
  4. Step 4: Simplify right side
    80,778.28x = 6,198,513,858.45
  5. Step 5: Solve for x
    x = 6,198,513,858.45/80,778.28
  6. Step 6: Final answer
    x = 76,734.91

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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.