Home / 138,594.56-191,247.06-78,174.68

Finding the Fourth Proportional to 138,594.56, 191,247.06 and 78,174.68

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Solution

The fourth proportional to 138,594.56, 191,247.06 and 78,174.68 is: 107,873.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,594.56 : 191,247.06 = 78,174.68 : x
  2. Step 2: Convert to fraction form
    138,594.56/191,247.06 = 78,174.68/x
  3. Step 3: Cross multiply
    138,594.56x = 191,247.06 × 78,174.68
  4. Step 4: Simplify right side
    138,594.56x = 14,950,677,716.44
  5. Step 5: Solve for x
    x = 14,950,677,716.44/138,594.56
  6. Step 6: Final answer
    x = 107,873.48

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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.