Home / 128,015.20-191,763.60-88,616.80

Finding the Fourth Proportional to 128,015.20, 191,763.60 and 88,616.80

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Solution

The fourth proportional to 128,015.20, 191,763.60 and 88,616.80 is: 132,745.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,015.20 : 191,763.60 = 88,616.80 : x
  2. Step 2: Convert to fraction form
    128,015.20/191,763.60 = 88,616.80/x
  3. Step 3: Cross multiply
    128,015.20x = 191,763.60 × 88,616.80
  4. Step 4: Simplify right side
    128,015.20x = 16,993,476,588.48
  5. Step 5: Solve for x
    x = 16,993,476,588.48/128,015.20
  6. Step 6: Final answer
    x = 132,745.77

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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.