Home / 221,355.54-331,836.06-81,081.36

Finding the Fourth Proportional to 221,355.54, 331,836.06 and 81,081.36

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Solution

The fourth proportional to 221,355.54, 331,836.06 and 81,081.36 is: 121,549.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,355.54 : 331,836.06 = 81,081.36 : x
  2. Step 2: Convert to fraction form
    221,355.54/331,836.06 = 81,081.36/x
  3. Step 3: Cross multiply
    221,355.54x = 331,836.06 × 81,081.36
  4. Step 4: Simplify right side
    221,355.54x = 26,905,719,041.84
  5. Step 5: Solve for x
    x = 26,905,719,041.84/221,355.54
  6. Step 6: Final answer
    x = 121,549.79

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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.