Home / 81,581.96-122,358.34-51,911.66

Finding the Fourth Proportional to 81,581.96, 122,358.34 and 51,911.66

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Solution

The fourth proportional to 81,581.96, 122,358.34 and 51,911.66 is: 77,858.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,581.96 : 122,358.34 = 51,911.66 : x
  2. Step 2: Convert to fraction form
    81,581.96/122,358.34 = 51,911.66/x
  3. Step 3: Cross multiply
    81,581.96x = 122,358.34 × 51,911.66
  4. Step 4: Simplify right side
    81,581.96x = 6,351,824,544.24
  5. Step 5: Solve for x
    x = 6,351,824,544.24/81,581.96
  6. Step 6: Final answer
    x = 77,858.20

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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.