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Finding the Fourth Proportional to 138,756, 191,482.92 and 75,093.78

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Solution

The fourth proportional to 138,756, 191,482.92 and 75,093.78 is: 103,629.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,756 : 191,482.92 = 75,093.78 : x
  2. Step 2: Convert to fraction form
    138,756/191,482.92 = 75,093.78/x
  3. Step 3: Cross multiply
    138,756x = 191,482.92 × 75,093.78
  4. Step 4: Simplify right side
    138,756x = 14,379,176,268.24
  5. Step 5: Solve for x
    x = 14,379,176,268.24/138,756
  6. Step 6: Final answer
    x = 103,629.22

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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.