Home / 128,245.56-192,407.26-90,877.92

Finding the Fourth Proportional to 128,245.56, 192,407.26 and 90,877.92

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Solution

The fourth proportional to 128,245.56, 192,407.26 and 90,877.92 is: 136,344.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,245.56 : 192,407.26 = 90,877.92 : x
  2. Step 2: Convert to fraction form
    128,245.56/192,407.26 = 90,877.92/x
  3. Step 3: Cross multiply
    128,245.56x = 192,407.26 × 90,877.92
  4. Step 4: Simplify right side
    128,245.56x = 17,485,571,581.70
  5. Step 5: Solve for x
    x = 17,485,571,581.70/128,245.56
  6. Step 6: Final answer
    x = 136,344.46

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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.