Home / 100,694.49-138,955.59-55,372.56

Finding the Fourth Proportional to 100,694.49, 138,955.59 and 55,372.56

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Solution

The fourth proportional to 100,694.49, 138,955.59 and 55,372.56 is: 76,412.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,694.49 : 138,955.59 = 55,372.56 : x
  2. Step 2: Convert to fraction form
    100,694.49/138,955.59 = 55,372.56/x
  3. Step 3: Cross multiply
    100,694.49x = 138,955.59 × 55,372.56
  4. Step 4: Simplify right side
    100,694.49x = 7,694,326,744.61
  5. Step 5: Solve for x
    x = 7,694,326,744.61/100,694.49
  6. Step 6: Final answer
    x = 76,412.59

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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.