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Finding the Fourth Proportional to 221,136.73, 305,168.78 and 125,643.55

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Solution

The fourth proportional to 221,136.73, 305,168.78 and 125,643.55 is: 173,388.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,136.73 : 305,168.78 = 125,643.55 : x
  2. Step 2: Convert to fraction form
    221,136.73/305,168.78 = 125,643.55/x
  3. Step 3: Cross multiply
    221,136.73x = 305,168.78 × 125,643.55
  4. Step 4: Simplify right side
    221,136.73x = 38,342,488,868.37
  5. Step 5: Solve for x
    x = 38,342,488,868.37/221,136.73
  6. Step 6: Final answer
    x = 173,388.15

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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.