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Finding the Fourth Proportional to 100,674.36, 138,927.63 and 55,352.43

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Solution

The fourth proportional to 100,674.36, 138,927.63 and 55,352.43 is: 76,384.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,674.36 : 138,927.63 = 55,352.43 : x
  2. Step 2: Convert to fraction form
    100,674.36/138,927.63 = 55,352.43/x
  3. Step 3: Cross multiply
    100,674.36x = 138,927.63 × 55,352.43
  4. Step 4: Simplify right side
    100,674.36x = 7,689,981,914.64
  5. Step 5: Solve for x
    x = 7,689,981,914.64/100,674.36
  6. Step 6: Final answer
    x = 76,384.71

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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.