Home / 138,694.26-191,350.53-78,257.46

Finding the Fourth Proportional to 138,694.26, 191,350.53 and 78,257.46

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Solution

The fourth proportional to 138,694.26, 191,350.53 and 78,257.46 is: 107,968.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,694.26 : 191,350.53 = 78,257.46 : x
  2. Step 2: Convert to fraction form
    138,694.26/191,350.53 = 78,257.46/x
  3. Step 3: Cross multiply
    138,694.26x = 191,350.53 × 78,257.46
  4. Step 4: Simplify right side
    138,694.26x = 14,974,606,447.45
  5. Step 5: Solve for x
    x = 14,974,606,447.45/138,694.26
  6. Step 6: Final answer
    x = 107,968.47

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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.