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Finding the Fourth Proportional to 104,781.64, 144,486.84 and 77,879.92

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Solution

The fourth proportional to 104,781.64, 144,486.84 and 77,879.92 is: 107,391.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,781.64 : 144,486.84 = 77,879.92 : x
  2. Step 2: Convert to fraction form
    104,781.64/144,486.84 = 77,879.92/x
  3. Step 3: Cross multiply
    104,781.64x = 144,486.84 × 77,879.92
  4. Step 4: Simplify right side
    104,781.64x = 11,252,623,540.25
  5. Step 5: Solve for x
    x = 11,252,623,540.25/104,781.64
  6. Step 6: Final answer
    x = 107,391.18

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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.