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Finding the Fourth Proportional to 85,514.96, 118,043.64 and 76,546.64

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Solution

The fourth proportional to 85,514.96, 118,043.64 and 76,546.64 is: 105,663.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,514.96 : 118,043.64 = 76,546.64 : x
  2. Step 2: Convert to fraction form
    85,514.96/118,043.64 = 76,546.64/x
  3. Step 3: Cross multiply
    85,514.96x = 118,043.64 × 76,546.64
  4. Step 4: Simplify right side
    85,514.96x = 9,035,844,015.37
  5. Step 5: Solve for x
    x = 9,035,844,015.37/85,514.96
  6. Step 6: Final answer
    x = 105,663.90

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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.