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Finding the Fourth Proportional to 75,164.76, 103,631.79 and 53,680.21

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Solution

The fourth proportional to 75,164.76, 103,631.79 and 53,680.21 is: 74,010.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,164.76 : 103,631.79 = 53,680.21 : x
  2. Step 2: Convert to fraction form
    75,164.76/103,631.79 = 53,680.21/x
  3. Step 3: Cross multiply
    75,164.76x = 103,631.79 × 53,680.21
  4. Step 4: Simplify right side
    75,164.76x = 5,562,976,249.88
  5. Step 5: Solve for x
    x = 5,562,976,249.88/75,164.76
  6. Step 6: Final answer
    x = 74,010.43

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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.