Home / 81,004.66-121,340.23-71,668.90

Finding the Fourth Proportional to 81,004.66, 121,340.23 and 71,668.90

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Solution

The fourth proportional to 81,004.66, 121,340.23 and 71,668.90 is: 107,355.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,004.66 : 121,340.23 = 71,668.90 : x
  2. Step 2: Convert to fraction form
    81,004.66/121,340.23 = 71,668.90/x
  3. Step 3: Cross multiply
    81,004.66x = 121,340.23 × 71,668.90
  4. Step 4: Simplify right side
    81,004.66x = 8,696,320,782.35
  5. Step 5: Solve for x
    x = 8,696,320,782.35/81,004.66
  6. Step 6: Final answer
    x = 107,355.81

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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.