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Finding the Fourth Proportional to 221,383.99, 305,508.39 and 125,890.66

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Solution

The fourth proportional to 221,383.99, 305,508.39 and 125,890.66 is: 173,728.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,383.99 : 305,508.39 = 125,890.66 : x
  2. Step 2: Convert to fraction form
    221,383.99/305,508.39 = 125,890.66/x
  3. Step 3: Cross multiply
    221,383.99x = 305,508.39 × 125,890.66
  4. Step 4: Simplify right side
    221,383.99x = 38,460,652,852.64
  5. Step 5: Solve for x
    x = 38,460,652,852.64/221,383.99
  6. Step 6: Final answer
    x = 173,728.25

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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.