Home / 205,129.20-307,618.64-86,809.76

Finding the Fourth Proportional to 205,129.20, 307,618.64 and 86,809.76

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Solution

The fourth proportional to 205,129.20, 307,618.64 and 86,809.76 is: 130,182.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,129.20 : 307,618.64 = 86,809.76 : x
  2. Step 2: Convert to fraction form
    205,129.20/307,618.64 = 86,809.76/x
  3. Step 3: Cross multiply
    205,129.20x = 307,618.64 × 86,809.76
  4. Step 4: Simplify right side
    205,129.20x = 26,704,300,309.93
  5. Step 5: Solve for x
    x = 26,704,300,309.93/205,129.20
  6. Step 6: Final answer
    x = 130,182.83

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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.