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Finding the Fourth Proportional to 86,785.86, 130,179.87 and 27,621.30

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Solution

The fourth proportional to 86,785.86, 130,179.87 and 27,621.30 is: 41,432.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,785.86 : 130,179.87 = 27,621.30 : x
  2. Step 2: Convert to fraction form
    86,785.86/130,179.87 = 27,621.30/x
  3. Step 3: Cross multiply
    86,785.86x = 130,179.87 × 27,621.30
  4. Step 4: Simplify right side
    86,785.86x = 3,595,737,243.23
  5. Step 5: Solve for x
    x = 3,595,737,243.23/86,785.86
  6. Step 6: Final answer
    x = 41,432.29

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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.