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Finding the Fourth Proportional to 221,099.87, 305,118.85 and 125,611.80

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Solution

The fourth proportional to 221,099.87, 305,118.85 and 125,611.80 is: 173,344.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,099.87 : 305,118.85 = 125,611.80 : x
  2. Step 2: Convert to fraction form
    221,099.87/305,118.85 = 125,611.80/x
  3. Step 3: Cross multiply
    221,099.87x = 305,118.85 × 125,611.80
  4. Step 4: Simplify right side
    221,099.87x = 38,326,527,334.37
  5. Step 5: Solve for x
    x = 38,326,527,334.37/221,099.87
  6. Step 6: Final answer
    x = 173,344.87

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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.