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Finding the Fourth Proportional to 121,879.71, 182,842.45 and 55,324.51

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Solution

The fourth proportional to 121,879.71, 182,842.45 and 55,324.51 is: 82,997.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,879.71 : 182,842.45 = 55,324.51 : x
  2. Step 2: Convert to fraction form
    121,879.71/182,842.45 = 55,324.51/x
  3. Step 3: Cross multiply
    121,879.71x = 182,842.45 × 55,324.51
  4. Step 4: Simplify right side
    121,879.71x = 10,115,668,358.03
  5. Step 5: Solve for x
    x = 10,115,668,358.03/121,879.71
  6. Step 6: Final answer
    x = 82,997.15

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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.