Home / 138,339.20-190,926.64-80,996

Finding the Fourth Proportional to 138,339.20, 190,926.64 and 80,996

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Solution

The fourth proportional to 138,339.20, 190,926.64 and 80,996 is: 111,785.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,339.20 : 190,926.64 = 80,996 : x
  2. Step 2: Convert to fraction form
    138,339.20/190,926.64 = 80,996/x
  3. Step 3: Cross multiply
    138,339.20x = 190,926.64 × 80,996
  4. Step 4: Simplify right side
    138,339.20x = 15,464,294,133.44
  5. Step 5: Solve for x
    x = 15,464,294,133.44/138,339.20
  6. Step 6: Final answer
    x = 111,785.34

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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.