Home / 204,811.30-307,260.15-86,421.70

Finding the Fourth Proportional to 204,811.30, 307,260.15 and 86,421.70

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Solution

The fourth proportional to 204,811.30, 307,260.15 and 86,421.70 is: 129,650.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,811.30 : 307,260.15 = 86,421.70 : x
  2. Step 2: Convert to fraction form
    204,811.30/307,260.15 = 86,421.70/x
  3. Step 3: Cross multiply
    204,811.30x = 307,260.15 × 86,421.70
  4. Step 4: Simplify right side
    204,811.30x = 26,553,944,505.26
  5. Step 5: Solve for x
    x = 26,553,944,505.26/204,811.30
  6. Step 6: Final answer
    x = 129,650.78

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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.