Home / 128,628.24-192,961.80-45,515.76

Finding the Fourth Proportional to 128,628.24, 192,961.80 and 45,515.76

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Solution

The fourth proportional to 128,628.24, 192,961.80 and 45,515.76 is: 68,280.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,628.24 : 192,961.80 = 45,515.76 : x
  2. Step 2: Convert to fraction form
    128,628.24/192,961.80 = 45,515.76/x
  3. Step 3: Cross multiply
    128,628.24x = 192,961.80 × 45,515.76
  4. Step 4: Simplify right side
    128,628.24x = 8,782,802,977.97
  5. Step 5: Solve for x
    x = 8,782,802,977.97/128,628.24
  6. Step 6: Final answer
    x = 68,280.52

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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.