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Finding the Fourth Proportional to 221,418.24, 331,842.24 and 81,009.60

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Solution

The fourth proportional to 221,418.24, 331,842.24 and 81,009.60 is: 121,410.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,418.24 : 331,842.24 = 81,009.60 : x
  2. Step 2: Convert to fraction form
    221,418.24/331,842.24 = 81,009.60/x
  3. Step 3: Cross multiply
    221,418.24x = 331,842.24 × 81,009.60
  4. Step 4: Simplify right side
    221,418.24x = 26,882,407,125.50
  5. Step 5: Solve for x
    x = 26,882,407,125.50/221,418.24
  6. Step 6: Final answer
    x = 121,410.08

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1.5x scale

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.