Home / 138,274.20-190,815.66-80,947.32

Finding the Fourth Proportional to 138,274.20, 190,815.66 and 80,947.32

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Solution

The fourth proportional to 138,274.20, 190,815.66 and 80,947.32 is: 111,705.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,274.20 : 190,815.66 = 80,947.32 : x
  2. Step 2: Convert to fraction form
    138,274.20/190,815.66 = 80,947.32/x
  3. Step 3: Cross multiply
    138,274.20x = 190,815.66 × 80,947.32
  4. Step 4: Simplify right side
    138,274.20x = 15,446,016,291.03
  5. Step 5: Solve for x
    x = 15,446,016,291.03/138,274.20
  6. Step 6: Final answer
    x = 111,705.70

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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.