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Finding the Fourth Proportional to 221,445.75, 305,611.56 and 125,983.20

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Solution

The fourth proportional to 221,445.75, 305,611.56 and 125,983.20 is: 173,866.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,445.75 : 305,611.56 = 125,983.20 : x
  2. Step 2: Convert to fraction form
    221,445.75/305,611.56 = 125,983.20/x
  3. Step 3: Cross multiply
    221,445.75x = 305,611.56 × 125,983.20
  4. Step 4: Simplify right side
    221,445.75x = 38,501,922,285.79
  5. Step 5: Solve for x
    x = 38,501,922,285.79/221,445.75
  6. Step 6: Final answer
    x = 173,866.16

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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.