Home / 138,667.22-191,344.30-78,234.33

Finding the Fourth Proportional to 138,667.22, 191,344.30 and 78,234.33

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Solution

The fourth proportional to 138,667.22, 191,344.30 and 78,234.33 is: 107,954.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,667.22 : 191,344.30 = 78,234.33 : x
  2. Step 2: Convert to fraction form
    138,667.22/191,344.30 = 78,234.33/x
  3. Step 3: Cross multiply
    138,667.22x = 191,344.30 × 78,234.33
  4. Step 4: Simplify right side
    138,667.22x = 14,969,693,109.82
  5. Step 5: Solve for x
    x = 14,969,693,109.82/138,667.22
  6. Step 6: Final answer
    x = 107,954.09

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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.