Home / 100,664.97-138,917.75-55,345.88

Finding the Fourth Proportional to 100,664.97, 138,917.75 and 55,345.88

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Solution

The fourth proportional to 100,664.97, 138,917.75 and 55,345.88 is: 76,377.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,664.97 : 138,917.75 = 55,345.88 : x
  2. Step 2: Convert to fraction form
    100,664.97/138,917.75 = 55,345.88/x
  3. Step 3: Cross multiply
    100,664.97x = 138,917.75 × 55,345.88
  4. Step 4: Simplify right side
    100,664.97x = 7,688,524,150.05
  5. Step 5: Solve for x
    x = 7,688,524,150.05/100,664.97
  6. Step 6: Final answer
    x = 76,377.36

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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.