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Finding the Fourth Proportional to 78,919.99, 118,397.48 and 22,755.71

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Solution

The fourth proportional to 78,919.99, 118,397.48 and 22,755.71 is: 34,138.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,919.99 : 118,397.48 = 22,755.71 : x
  2. Step 2: Convert to fraction form
    78,919.99/118,397.48 = 22,755.71/x
  3. Step 3: Cross multiply
    78,919.99x = 118,397.48 × 22,755.71
  4. Step 4: Simplify right side
    78,919.99x = 2,694,218,901.83
  5. Step 5: Solve for x
    x = 2,694,218,901.83/78,919.99
  6. Step 6: Final answer
    x = 34,138.61

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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.