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Finding the Fourth Proportional to 100,855.68, 139,179.69 and 55,532.72

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Solution

The fourth proportional to 100,855.68, 139,179.69 and 55,532.72 is: 76,634.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,855.68 : 139,179.69 = 55,532.72 : x
  2. Step 2: Convert to fraction form
    100,855.68/139,179.69 = 55,532.72/x
  3. Step 3: Cross multiply
    100,855.68x = 139,179.69 × 55,532.72
  4. Step 4: Simplify right side
    100,855.68x = 7,729,026,058.56
  5. Step 5: Solve for x
    x = 7,729,026,058.56/100,855.68
  6. Step 6: Final answer
    x = 76,634.51

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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.