Home / 138,494.59-191,137.23-81,182.06

Finding the Fourth Proportional to 138,494.59, 191,137.23 and 81,182.06

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Solution

The fourth proportional to 138,494.59, 191,137.23 and 81,182.06 is: 112,039.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,494.59 : 191,137.23 = 81,182.06 : x
  2. Step 2: Convert to fraction form
    138,494.59/191,137.23 = 81,182.06/x
  3. Step 3: Cross multiply
    138,494.59x = 191,137.23 × 81,182.06
  4. Step 4: Simplify right side
    138,494.59x = 15,516,914,074.09
  5. Step 5: Solve for x
    x = 15,516,914,074.09/138,494.59
  6. Step 6: Final answer
    x = 112,039.86

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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.