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Finding the Fourth Proportional to 221,367.55, 305,485.80 and 125,874.22

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Solution

The fourth proportional to 221,367.55, 305,485.80 and 125,874.22 is: 173,705.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,367.55 : 305,485.80 = 125,874.22 : x
  2. Step 2: Convert to fraction form
    221,367.55/305,485.80 = 125,874.22/x
  3. Step 3: Cross multiply
    221,367.55x = 305,485.80 × 125,874.22
  4. Step 4: Simplify right side
    221,367.55x = 38,452,786,796.08
  5. Step 5: Solve for x
    x = 38,452,786,796.08/221,367.55
  6. Step 6: Final answer
    x = 173,705.62

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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.