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Finding the Fourth Proportional to 138,703.21, 191,606.39 and 110,372.65

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Solution

The fourth proportional to 138,703.21, 191,606.39 and 110,372.65 is: 152,470.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,703.21 : 191,606.39 = 110,372.65 : x
  2. Step 2: Convert to fraction form
    138,703.21/191,606.39 = 110,372.65/x
  3. Step 3: Cross multiply
    138,703.21x = 191,606.39 × 110,372.65
  4. Step 4: Simplify right side
    138,703.21x = 21,148,104,469.37
  5. Step 5: Solve for x
    x = 21,148,104,469.37/138,703.21
  6. Step 6: Final answer
    x = 152,470.19

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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.