Home / 128,426.20-192,635.70-58,305.40

Finding the Fourth Proportional to 128,426.20, 192,635.70 and 58,305.40

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Solution

The fourth proportional to 128,426.20, 192,635.70 and 58,305.40 is: 87,456.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,426.20 : 192,635.70 = 58,305.40 : x
  2. Step 2: Convert to fraction form
    128,426.20/192,635.70 = 58,305.40/x
  3. Step 3: Cross multiply
    128,426.20x = 192,635.70 × 58,305.40
  4. Step 4: Simplify right side
    128,426.20x = 11,231,701,542.78
  5. Step 5: Solve for x
    x = 11,231,701,542.78/128,426.20
  6. Step 6: Final answer
    x = 87,456.47

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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.