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Finding the Fourth Proportional to 207,669.84, 311,530.68 and 81,293.76

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Solution

The fourth proportional to 207,669.84, 311,530.68 and 81,293.76 is: 121,950.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,669.84 : 311,530.68 = 81,293.76 : x
  2. Step 2: Convert to fraction form
    207,669.84/311,530.68 = 81,293.76/x
  3. Step 3: Cross multiply
    207,669.84x = 311,530.68 × 81,293.76
  4. Step 4: Simplify right side
    207,669.84x = 25,325,500,332.56
  5. Step 5: Solve for x
    x = 25,325,500,332.56/207,669.84
  6. Step 6: Final answer
    x = 121,950.79

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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.