Home / 138,068.52-190,659.42-87,171.36

Finding the Fourth Proportional to 138,068.52, 190,659.42 and 87,171.36

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Solution

The fourth proportional to 138,068.52, 190,659.42 and 87,171.36 is: 120,375.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,068.52 : 190,659.42 = 87,171.36 : x
  2. Step 2: Convert to fraction form
    138,068.52/190,659.42 = 87,171.36/x
  3. Step 3: Cross multiply
    138,068.52x = 190,659.42 × 87,171.36
  4. Step 4: Simplify right side
    138,068.52x = 16,620,040,938.21
  5. Step 5: Solve for x
    x = 16,620,040,938.21/138,068.52
  6. Step 6: Final answer
    x = 120,375.31

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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.