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Finding the Fourth Proportional to 273,609.71, 410,477.78 and 86,621.21

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Solution

The fourth proportional to 273,609.71, 410,477.78 and 86,621.21 is: 129,951.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    273,609.71 : 410,477.78 = 86,621.21 : x
  2. Step 2: Convert to fraction form
    273,609.71/410,477.78 = 86,621.21/x
  3. Step 3: Cross multiply
    273,609.71x = 410,477.78 × 86,621.21
  4. Step 4: Simplify right side
    273,609.71x = 35,556,081,548.61
  5. Step 5: Solve for x
    x = 35,556,081,548.61/273,609.71
  6. Step 6: Final answer
    x = 129,951.83

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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.