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Finding the Fourth Proportional to 221,651.04, 305,890.26 and 126,188.49

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Solution

The fourth proportional to 221,651.04, 305,890.26 and 126,188.49 is: 174,146.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,651.04 : 305,890.26 = 126,188.49 : x
  2. Step 2: Convert to fraction form
    221,651.04/305,890.26 = 126,188.49/x
  3. Step 3: Cross multiply
    221,651.04x = 305,890.26 × 126,188.49
  4. Step 4: Simplify right side
    221,651.04x = 38,599,830,015.11
  5. Step 5: Solve for x
    x = 38,599,830,015.11/221,651.04
  6. Step 6: Final answer
    x = 174,146.85

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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.