Home / 138,099.54-190,548.78-80,727.78

Finding the Fourth Proportional to 138,099.54, 190,548.78 and 80,727.78

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Solution

The fourth proportional to 138,099.54, 190,548.78 and 80,727.78 is: 111,387.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,099.54 : 190,548.78 = 80,727.78 : x
  2. Step 2: Convert to fraction form
    138,099.54/190,548.78 = 80,727.78/x
  3. Step 3: Cross multiply
    138,099.54x = 190,548.78 × 80,727.78
  4. Step 4: Simplify right side
    138,099.54x = 15,382,579,991.11
  5. Step 5: Solve for x
    x = 15,382,579,991.11/138,099.54
  6. Step 6: Final answer
    x = 111,387.63

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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.