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Finding the Fourth Proportional to 85,236.45, 117,676.74 and 75,778.89

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Solution

The fourth proportional to 85,236.45, 117,676.74 and 75,778.89 is: 104,619.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,236.45 : 117,676.74 = 75,778.89 : x
  2. Step 2: Convert to fraction form
    85,236.45/117,676.74 = 75,778.89/x
  3. Step 3: Cross multiply
    85,236.45x = 117,676.74 × 75,778.89
  4. Step 4: Simplify right side
    85,236.45x = 8,917,412,147.63
  5. Step 5: Solve for x
    x = 8,917,412,147.63/85,236.45
  6. Step 6: Final answer
    x = 104,619.71

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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.