Home / 138,886.06-191,661.87-78,476.26

Finding the Fourth Proportional to 138,886.06, 191,661.87 and 78,476.26

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Solution

The fourth proportional to 138,886.06, 191,661.87 and 78,476.26 is: 108,296.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,886.06 : 191,661.87 = 78,476.26 : x
  2. Step 2: Convert to fraction form
    138,886.06/191,661.87 = 78,476.26/x
  3. Step 3: Cross multiply
    138,886.06x = 191,661.87 × 78,476.26
  4. Step 4: Simplify right side
    138,886.06x = 15,040,906,742.21
  5. Step 5: Solve for x
    x = 15,040,906,742.21/138,886.06
  6. Step 6: Final answer
    x = 108,296.73

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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.