Home / 209,786.76-314,636.40-76,729.68

Finding the Fourth Proportional to 209,786.76, 314,636.40 and 76,729.68

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Solution

The fourth proportional to 209,786.76, 314,636.40 and 76,729.68 is: 115,078.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,786.76 : 314,636.40 = 76,729.68 : x
  2. Step 2: Convert to fraction form
    209,786.76/314,636.40 = 76,729.68/x
  3. Step 3: Cross multiply
    209,786.76x = 314,636.40 × 76,729.68
  4. Step 4: Simplify right side
    209,786.76x = 24,141,950,288.35
  5. Step 5: Solve for x
    x = 24,141,950,288.35/209,786.76
  6. Step 6: Final answer
    x = 115,078.52

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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.