Home / 221,322.40-331,945.20-81,008.80

Finding the Fourth Proportional to 221,322.40, 331,945.20 and 81,008.80

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Solution

The fourth proportional to 221,322.40, 331,945.20 and 81,008.80 is: 121,499.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,322.40 : 331,945.20 = 81,008.80 : x
  2. Step 2: Convert to fraction form
    221,322.40/331,945.20 = 81,008.80/x
  3. Step 3: Cross multiply
    221,322.40x = 331,945.20 × 81,008.80
  4. Step 4: Simplify right side
    221,322.40x = 26,890,482,317.76
  5. Step 5: Solve for x
    x = 26,890,482,317.76/221,322.40
  6. Step 6: Final answer
    x = 121,499.14

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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.