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Finding the Fourth Proportional to 219,379.26, 329,068.92 and 79,137.86

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Solution

The fourth proportional to 219,379.26, 329,068.92 and 79,137.86 is: 118,706.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,379.26 : 329,068.92 = 79,137.86 : x
  2. Step 2: Convert to fraction form
    219,379.26/329,068.92 = 79,137.86/x
  3. Step 3: Cross multiply
    219,379.26x = 329,068.92 × 79,137.86
  4. Step 4: Simplify right side
    219,379.26x = 26,041,810,121.31
  5. Step 5: Solve for x
    x = 26,041,810,121.31/219,379.26
  6. Step 6: Final answer
    x = 118,706.80

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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.