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Finding the Fourth Proportional to 221,479.56, 305,642.04 and 120,877.56

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Solution

The fourth proportional to 221,479.56, 305,642.04 and 120,877.56 is: 166,811.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,479.56 : 305,642.04 = 120,877.56 : x
  2. Step 2: Convert to fraction form
    221,479.56/305,642.04 = 120,877.56/x
  3. Step 3: Cross multiply
    221,479.56x = 305,642.04 × 120,877.56
  4. Step 4: Simplify right side
    221,479.56x = 36,945,264,028.62
  5. Step 5: Solve for x
    x = 36,945,264,028.62/221,479.56
  6. Step 6: Final answer
    x = 166,811.17

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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.