Home / 138,419.12-190,819.32-98,606

Finding the Fourth Proportional to 138,419.12, 190,819.32 and 98,606

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Solution

The fourth proportional to 138,419.12, 190,819.32 and 98,606 is: 135,934.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,419.12 : 190,819.32 = 98,606 : x
  2. Step 2: Convert to fraction form
    138,419.12/190,819.32 = 98,606/x
  3. Step 3: Cross multiply
    138,419.12x = 190,819.32 × 98,606
  4. Step 4: Simplify right side
    138,419.12x = 18,815,929,867.92
  5. Step 5: Solve for x
    x = 18,815,929,867.92/138,419.12
  6. Step 6: Final answer
    x = 135,934.47

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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.