Home / 138,097.78-190,546.36-80,726.02

Finding the Fourth Proportional to 138,097.78, 190,546.36 and 80,726.02

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Solution

The fourth proportional to 138,097.78, 190,546.36 and 80,726.02 is: 111,385.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,097.78 : 190,546.36 = 80,726.02 : x
  2. Step 2: Convert to fraction form
    138,097.78/190,546.36 = 80,726.02/x
  3. Step 3: Cross multiply
    138,097.78x = 190,546.36 × 80,726.02
  4. Step 4: Simplify right side
    138,097.78x = 15,382,049,268.29
  5. Step 5: Solve for x
    x = 15,382,049,268.29/138,097.78
  6. Step 6: Final answer
    x = 111,385.20

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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.