Home / 138,620.51-191,337.21-81,272.29

Finding the Fourth Proportional to 138,620.51, 191,337.21 and 81,272.29

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Solution

The fourth proportional to 138,620.51, 191,337.21 and 81,272.29 is: 112,179.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,620.51 : 191,337.21 = 81,272.29 : x
  2. Step 2: Convert to fraction form
    138,620.51/191,337.21 = 81,272.29/x
  3. Step 3: Cross multiply
    138,620.51x = 191,337.21 × 81,272.29
  4. Step 4: Simplify right side
    138,620.51x = 15,550,412,740.57
  5. Step 5: Solve for x
    x = 15,550,412,740.57/138,620.51
  6. Step 6: Final answer
    x = 112,179.74

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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.