Home / 138,015.14-190,459.82-76,761.88

Finding the Fourth Proportional to 138,015.14, 190,459.82 and 76,761.88

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Solution

The fourth proportional to 138,015.14, 190,459.82 and 76,761.88 is: 105,930.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,015.14 : 190,459.82 = 76,761.88 : x
  2. Step 2: Convert to fraction form
    138,015.14/190,459.82 = 76,761.88/x
  3. Step 3: Cross multiply
    138,015.14x = 190,459.82 × 76,761.88
  4. Step 4: Simplify right side
    138,015.14x = 14,620,053,847.66
  5. Step 5: Solve for x
    x = 14,620,053,847.66/138,015.14
  6. Step 6: Final answer
    x = 105,930.80

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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.