Home / 100,694.13-138,954.94-55,372.06

Finding the Fourth Proportional to 100,694.13, 138,954.94 and 55,372.06

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Solution

The fourth proportional to 100,694.13, 138,954.94 and 55,372.06 is: 76,411.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,694.13 : 138,954.94 = 55,372.06 : x
  2. Step 2: Convert to fraction form
    100,694.13/138,954.94 = 55,372.06/x
  3. Step 3: Cross multiply
    100,694.13x = 138,954.94 × 55,372.06
  4. Step 4: Simplify right side
    100,694.13x = 7,694,221,274.98
  5. Step 5: Solve for x
    x = 7,694,221,274.98/100,694.13
  6. Step 6: Final answer
    x = 76,411.82

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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.