Home / 100,664.82-138,919.05-55,344.78

Finding the Fourth Proportional to 100,664.82, 138,919.05 and 55,344.78

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Solution

The fourth proportional to 100,664.82, 138,919.05 and 55,344.78 is: 76,376.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,664.82 : 138,919.05 = 55,344.78 : x
  2. Step 2: Convert to fraction form
    100,664.82/138,919.05 = 55,344.78/x
  3. Step 3: Cross multiply
    100,664.82x = 138,919.05 × 55,344.78
  4. Step 4: Simplify right side
    100,664.82x = 7,688,444,260.06
  5. Step 5: Solve for x
    x = 7,688,444,260.06/100,664.82
  6. Step 6: Final answer
    x = 76,376.68

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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.