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Finding the Fourth Proportional to 104,791.75, 144,292.37 and 78,987.78

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Solution

The fourth proportional to 104,791.75, 144,292.37 and 78,987.78 is: 108,761.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,791.75 : 144,292.37 = 78,987.78 : x
  2. Step 2: Convert to fraction form
    104,791.75/144,292.37 = 78,987.78/x
  3. Step 3: Cross multiply
    104,791.75x = 144,292.37 × 78,987.78
  4. Step 4: Simplify right side
    104,791.75x = 11,397,333,582.30
  5. Step 5: Solve for x
    x = 11,397,333,582.30/104,791.75
  6. Step 6: Final answer
    x = 108,761.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.