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Finding the Fourth Proportional to 100,363.56, 138,494.18 and 55,034.28

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Solution

The fourth proportional to 100,363.56, 138,494.18 and 55,034.28 is: 75,943.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,363.56 : 138,494.18 = 55,034.28 : x
  2. Step 2: Convert to fraction form
    100,363.56/138,494.18 = 55,034.28/x
  3. Step 3: Cross multiply
    100,363.56x = 138,494.18 × 55,034.28
  4. Step 4: Simplify right side
    100,363.56x = 7,621,927,480.49
  5. Step 5: Solve for x
    x = 7,621,927,480.49/100,363.56
  6. Step 6: Final answer
    x = 75,943.18

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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.