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Finding the Fourth Proportional to 218,826, 328,239.10 and 69,081.48

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Solution

The fourth proportional to 218,826, 328,239.10 and 69,081.48 is: 103,622.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,826 : 328,239.10 = 69,081.48 : x
  2. Step 2: Convert to fraction form
    218,826/328,239.10 = 69,081.48/x
  3. Step 3: Cross multiply
    218,826x = 328,239.10 × 69,081.48
  4. Step 4: Simplify right side
    218,826x = 22,675,242,821.87
  5. Step 5: Solve for x
    x = 22,675,242,821.87/218,826
  6. Step 6: Final answer
    x = 103,622.25

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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.