Home / 213,977.76-320,970.28-80,920.68

Finding the Fourth Proportional to 213,977.76, 320,970.28 and 80,920.68

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Solution

The fourth proportional to 213,977.76, 320,970.28 and 80,920.68 is: 121,382.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,977.76 : 320,970.28 = 80,920.68 : x
  2. Step 2: Convert to fraction form
    213,977.76/320,970.28 = 80,920.68/x
  3. Step 3: Cross multiply
    213,977.76x = 320,970.28 × 80,920.68
  4. Step 4: Simplify right side
    213,977.76x = 25,973,133,317.39
  5. Step 5: Solve for x
    x = 25,973,133,317.39/213,977.76
  6. Step 6: Final answer
    x = 121,382.40

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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.