Home / 128,221.20-192,290.76-42,813.72

Finding the Fourth Proportional to 128,221.20, 192,290.76 and 42,813.72

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Solution

The fourth proportional to 128,221.20, 192,290.76 and 42,813.72 is: 64,206.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,221.20 : 192,290.76 = 42,813.72 : x
  2. Step 2: Convert to fraction form
    128,221.20/192,290.76 = 42,813.72/x
  3. Step 3: Cross multiply
    128,221.20x = 192,290.76 × 42,813.72
  4. Step 4: Simplify right side
    128,221.20x = 8,232,682,757.23
  5. Step 5: Solve for x
    x = 8,232,682,757.23/128,221.20
  6. Step 6: Final answer
    x = 64,206.88

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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.