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Finding the Fourth Proportional to 218,811.76, 328,217.72 and 69,067.19

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Solution

The fourth proportional to 218,811.76, 328,217.72 and 69,067.19 is: 103,600.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,811.76 : 328,217.72 = 69,067.19 : x
  2. Step 2: Convert to fraction form
    218,811.76/328,217.72 = 69,067.19/x
  3. Step 3: Cross multiply
    218,811.76x = 328,217.72 × 69,067.19
  4. Step 4: Simplify right side
    218,811.76x = 22,669,076,103.82
  5. Step 5: Solve for x
    x = 22,669,076,103.82/218,811.76
  6. Step 6: Final answer
    x = 103,600.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.