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Finding the Fourth Proportional to 100,935.28, 139,290.84 and 54,994.71

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Solution

The fourth proportional to 100,935.28, 139,290.84 and 54,994.71 is: 75,892.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,935.28 : 139,290.84 = 54,994.71 : x
  2. Step 2: Convert to fraction form
    100,935.28/139,290.84 = 54,994.71/x
  3. Step 3: Cross multiply
    100,935.28x = 139,290.84 × 54,994.71
  4. Step 4: Simplify right side
    100,935.28x = 7,660,259,351.46
  5. Step 5: Solve for x
    x = 7,660,259,351.46/100,935.28
  6. Step 6: Final answer
    x = 75,892.79

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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.