Home / 221,601.92-305,809.44-120,999.20

Finding the Fourth Proportional to 221,601.92, 305,809.44 and 120,999.20

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Solution

The fourth proportional to 221,601.92, 305,809.44 and 120,999.20 is: 166,978.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,601.92 : 305,809.44 = 120,999.20 : x
  2. Step 2: Convert to fraction form
    221,601.92/305,809.44 = 120,999.20/x
  3. Step 3: Cross multiply
    221,601.92x = 305,809.44 × 120,999.20
  4. Step 4: Simplify right side
    221,601.92x = 37,002,697,592.45
  5. Step 5: Solve for x
    x = 37,002,697,592.45/221,601.92
  6. Step 6: Final answer
    x = 166,978.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.