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Finding the Fourth Proportional to 100,571.44, 138,788.64 and 55,859.44

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Solution

The fourth proportional to 100,571.44, 138,788.64 and 55,859.44 is: 77,086.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,571.44 : 138,788.64 = 55,859.44 : x
  2. Step 2: Convert to fraction form
    100,571.44/138,788.64 = 55,859.44/x
  3. Step 3: Cross multiply
    100,571.44x = 138,788.64 × 55,859.44
  4. Step 4: Simplify right side
    100,571.44x = 7,752,655,708.76
  5. Step 5: Solve for x
    x = 7,752,655,708.76/100,571.44
  6. Step 6: Final answer
    x = 77,086.06

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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.