Home / 221,255.28-305,221.74-139,684.62

Finding the Fourth Proportional to 221,255.28, 305,221.74 and 139,684.62

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Solution

The fourth proportional to 221,255.28, 305,221.74 and 139,684.62 is: 192,694.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,255.28 : 305,221.74 = 139,684.62 : x
  2. Step 2: Convert to fraction form
    221,255.28/305,221.74 = 139,684.62/x
  3. Step 3: Cross multiply
    221,255.28x = 305,221.74 × 139,684.62
  4. Step 4: Simplify right side
    221,255.28x = 42,634,782,767.64
  5. Step 5: Solve for x
    x = 42,634,782,767.64/221,255.28
  6. Step 6: Final answer
    x = 192,694.98

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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.