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Finding the Fourth Proportional to 85,760.11, 128,652.62 and 26,600.54

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Solution

The fourth proportional to 85,760.11, 128,652.62 and 26,600.54 is: 39,904.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,760.11 : 128,652.62 = 26,600.54 : x
  2. Step 2: Convert to fraction form
    85,760.11/128,652.62 = 26,600.54/x
  3. Step 3: Cross multiply
    85,760.11x = 128,652.62 × 26,600.54
  4. Step 4: Simplify right side
    85,760.11x = 3,422,229,164.41
  5. Step 5: Solve for x
    x = 3,422,229,164.41/85,760.11
  6. Step 6: Final answer
    x = 39,904.67

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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.