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Finding the Fourth Proportional to 85,305.83, 117,759.80 and 55,105.88

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Solution

The fourth proportional to 85,305.83, 117,759.80 and 55,105.88 is: 76,070.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,305.83 : 117,759.80 = 55,105.88 : x
  2. Step 2: Convert to fraction form
    85,305.83/117,759.80 = 55,105.88/x
  3. Step 3: Cross multiply
    85,305.83x = 117,759.80 × 55,105.88
  4. Step 4: Simplify right side
    85,305.83x = 6,489,256,837.70
  5. Step 5: Solve for x
    x = 6,489,256,837.70/85,305.83
  6. Step 6: Final answer
    x = 76,070.49

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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.