Home / 142,105.86-196,107.66-78,443.73

Finding the Fourth Proportional to 142,105.86, 196,107.66 and 78,443.73

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Solution

The fourth proportional to 142,105.86, 196,107.66 and 78,443.73 is: 108,253.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,105.86 : 196,107.66 = 78,443.73 : x
  2. Step 2: Convert to fraction form
    142,105.86/196,107.66 = 78,443.73/x
  3. Step 3: Cross multiply
    142,105.86x = 196,107.66 × 78,443.73
  4. Step 4: Simplify right side
    142,105.86x = 15,383,416,331.97
  5. Step 5: Solve for x
    x = 15,383,416,331.97/142,105.86
  6. Step 6: Final answer
    x = 108,253.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.