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Finding the Fourth Proportional to 81,359.18, 122,057.18 and 43,918.45

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Solution

The fourth proportional to 81,359.18, 122,057.18 and 43,918.45 is: 65,887.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,359.18 : 122,057.18 = 43,918.45 : x
  2. Step 2: Convert to fraction form
    81,359.18/122,057.18 = 43,918.45/x
  3. Step 3: Cross multiply
    81,359.18x = 122,057.18 × 43,918.45
  4. Step 4: Simplify right side
    81,359.18x = 5,360,562,483.50
  5. Step 5: Solve for x
    x = 5,360,562,483.50/81,359.18
  6. Step 6: Final answer
    x = 65,887.61

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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.