Home / 206,929.72-310,788.24-128,591.36

Finding the Fourth Proportional to 206,929.72, 310,788.24 and 128,591.36

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Solution

The fourth proportional to 206,929.72, 310,788.24 and 128,591.36 is: 193,131.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,929.72 : 310,788.24 = 128,591.36 : x
  2. Step 2: Convert to fraction form
    206,929.72/310,788.24 = 128,591.36/x
  3. Step 3: Cross multiply
    206,929.72x = 310,788.24 × 128,591.36
  4. Step 4: Simplify right side
    206,929.72x = 39,964,682,453.61
  5. Step 5: Solve for x
    x = 39,964,682,453.61/206,929.72
  6. Step 6: Final answer
    x = 193,131.67

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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.