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Finding the Fourth Proportional to 76,873.77, 115,301.11 and 20,718.27

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Solution

The fourth proportional to 76,873.77, 115,301.11 and 20,718.27 is: 31,074.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,873.77 : 115,301.11 = 20,718.27 : x
  2. Step 2: Convert to fraction form
    76,873.77/115,301.11 = 20,718.27/x
  3. Step 3: Cross multiply
    76,873.77x = 115,301.11 × 20,718.27
  4. Step 4: Simplify right side
    76,873.77x = 2,388,839,528.28
  5. Step 5: Solve for x
    x = 2,388,839,528.28/76,873.77
  6. Step 6: Final answer
    x = 31,074.83

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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.