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Finding the Fourth Proportional to 221,108.88, 305,131.41 and 125,621.04

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Solution

The fourth proportional to 221,108.88, 305,131.41 and 125,621.04 is: 173,357.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,108.88 : 305,131.41 = 125,621.04 : x
  2. Step 2: Convert to fraction form
    221,108.88/305,131.41 = 125,621.04/x
  3. Step 3: Cross multiply
    221,108.88x = 305,131.41 × 125,621.04
  4. Step 4: Simplify right side
    221,108.88x = 38,330,925,060.87
  5. Step 5: Solve for x
    x = 38,330,925,060.87/221,108.88
  6. Step 6: Final answer
    x = 173,357.69

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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.