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Finding the Fourth Proportional to 221,041.56, 331,627.04 and 71,278.84

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Solution

The fourth proportional to 221,041.56, 331,627.04 and 71,278.84 is: 106,939.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,041.56 : 331,627.04 = 71,278.84 : x
  2. Step 2: Convert to fraction form
    221,041.56/331,627.04 = 71,278.84/x
  3. Step 3: Cross multiply
    221,041.56x = 331,627.04 × 71,278.84
  4. Step 4: Simplify right side
    221,041.56x = 23,637,990,723.83
  5. Step 5: Solve for x
    x = 23,637,990,723.83/221,041.56
  6. Step 6: Final answer
    x = 106,939.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.