Home / 128,456.20-192,680.70-58,335.40

Finding the Fourth Proportional to 128,456.20, 192,680.70 and 58,335.40

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Solution

The fourth proportional to 128,456.20, 192,680.70 and 58,335.40 is: 87,501.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,456.20 : 192,680.70 = 58,335.40 : x
  2. Step 2: Convert to fraction form
    128,456.20/192,680.70 = 58,335.40/x
  3. Step 3: Cross multiply
    128,456.20x = 192,680.70 × 58,335.40
  4. Step 4: Simplify right side
    128,456.20x = 11,240,105,706.78
  5. Step 5: Solve for x
    x = 11,240,105,706.78/128,456.20
  6. Step 6: Final answer
    x = 87,501.47

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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.