Home / 221,912.32-306,399.36-137,145.60

Finding the Fourth Proportional to 221,912.32, 306,399.36 and 137,145.60

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Solution

The fourth proportional to 221,912.32, 306,399.36 and 137,145.60 is: 189,360.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,912.32 : 306,399.36 = 137,145.60 : x
  2. Step 2: Convert to fraction form
    221,912.32/306,399.36 = 137,145.60/x
  3. Step 3: Cross multiply
    221,912.32x = 306,399.36 × 137,145.60
  4. Step 4: Simplify right side
    221,912.32x = 42,021,324,066.82
  5. Step 5: Solve for x
    x = 42,021,324,066.82/221,912.32
  6. Step 6: Final answer
    x = 189,360.03

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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.