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Finding the Fourth Proportional to 219,115.86, 328,640.79 and 69,336.66

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Solution

The fourth proportional to 219,115.86, 328,640.79 and 69,336.66 is: 103,994.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,115.86 : 328,640.79 = 69,336.66 : x
  2. Step 2: Convert to fraction form
    219,115.86/328,640.79 = 69,336.66/x
  3. Step 3: Cross multiply
    219,115.86x = 328,640.79 × 69,336.66
  4. Step 4: Simplify right side
    219,115.86x = 22,786,854,718.36
  5. Step 5: Solve for x
    x = 22,786,854,718.36/219,115.86
  6. Step 6: Final answer
    x = 103,994.55

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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.