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Finding the Fourth Proportional to 221,039.81, 305,034.94 and 120,437.81

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Solution

The fourth proportional to 221,039.81, 305,034.94 and 120,437.81 is: 166,204.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,039.81 : 305,034.94 = 120,437.81 : x
  2. Step 2: Convert to fraction form
    221,039.81/305,034.94 = 120,437.81/x
  3. Step 3: Cross multiply
    221,039.81x = 305,034.94 × 120,437.81
  4. Step 4: Simplify right side
    221,039.81x = 36,737,740,147.08
  5. Step 5: Solve for x
    x = 36,737,740,147.08/221,039.81
  6. Step 6: Final answer
    x = 166,204.18

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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.