Home / 85,761.12-128,654.12-26,601.54

Finding the Fourth Proportional to 85,761.12, 128,654.12 and 26,601.54

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Solution

The fourth proportional to 85,761.12, 128,654.12 and 26,601.54 is: 39,906.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,761.12 : 128,654.12 = 26,601.54 : x
  2. Step 2: Convert to fraction form
    85,761.12/128,654.12 = 26,601.54/x
  3. Step 3: Cross multiply
    85,761.12x = 128,654.12 × 26,601.54
  4. Step 4: Simplify right side
    85,761.12x = 3,422,397,719.34
  5. Step 5: Solve for x
    x = 3,422,397,719.34/85,761.12
  6. Step 6: Final answer
    x = 39,906.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.