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Finding the Fourth Proportional to 138,725.46, 191,441.48 and 75,063.92

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Solution

The fourth proportional to 138,725.46, 191,441.48 and 75,063.92 is: 103,588.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,725.46 : 191,441.48 = 75,063.92 : x
  2. Step 2: Convert to fraction form
    138,725.46/191,441.48 = 75,063.92/x
  3. Step 3: Cross multiply
    138,725.46x = 191,441.48 × 75,063.92
  4. Step 4: Simplify right side
    138,725.46x = 14,370,346,606.87
  5. Step 5: Solve for x
    x = 14,370,346,606.87/138,725.46
  6. Step 6: Final answer
    x = 103,588.39

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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.