Home / 81,771.52-122,890.56-40,247.68

Finding the Fourth Proportional to 81,771.52, 122,890.56 and 40,247.68

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Solution

The fourth proportional to 81,771.52, 122,890.56 and 40,247.68 is: 60,486.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,771.52 : 122,890.56 = 40,247.68 : x
  2. Step 2: Convert to fraction form
    81,771.52/122,890.56 = 40,247.68/x
  3. Step 3: Cross multiply
    81,771.52x = 122,890.56 × 40,247.68
  4. Step 4: Simplify right side
    81,771.52x = 4,946,059,933.90
  5. Step 5: Solve for x
    x = 4,946,059,933.90/81,771.52
  6. Step 6: Final answer
    x = 60,486.34

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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.