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Finding the Fourth Proportional to 74,814.48, 103,380.84 and 71,169.84

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Solution

The fourth proportional to 74,814.48, 103,380.84 and 71,169.84 is: 98,344.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,814.48 : 103,380.84 = 71,169.84 : x
  2. Step 2: Convert to fraction form
    74,814.48/103,380.84 = 71,169.84/x
  3. Step 3: Cross multiply
    74,814.48x = 103,380.84 × 71,169.84
  4. Step 4: Simplify right side
    74,814.48x = 7,357,597,841.87
  5. Step 5: Solve for x
    x = 7,357,597,841.87/74,814.48
  6. Step 6: Final answer
    x = 98,344.57

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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.