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Finding the Fourth Proportional to 81,655.48, 122,379.54 and 44,745.40

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Solution

The fourth proportional to 81,655.48, 122,379.54 and 44,745.40 is: 67,061.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,655.48 : 122,379.54 = 44,745.40 : x
  2. Step 2: Convert to fraction form
    81,655.48/122,379.54 = 44,745.40/x
  3. Step 3: Cross multiply
    81,655.48x = 122,379.54 × 44,745.40
  4. Step 4: Simplify right side
    81,655.48x = 5,475,921,469.12
  5. Step 5: Solve for x
    x = 5,475,921,469.12/81,655.48
  6. Step 6: Final answer
    x = 67,061.29

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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.