Home / 221,107.72-305,090.40-130,456.84

Finding the Fourth Proportional to 221,107.72, 305,090.40 and 130,456.84

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Solution

The fourth proportional to 221,107.72, 305,090.40 and 130,456.84 is: 180,007.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,107.72 : 305,090.40 = 130,456.84 : x
  2. Step 2: Convert to fraction form
    221,107.72/305,090.40 = 130,456.84/x
  3. Step 3: Cross multiply
    221,107.72x = 305,090.40 × 130,456.84
  4. Step 4: Simplify right side
    221,107.72x = 39,801,129,498.34
  5. Step 5: Solve for x
    x = 39,801,129,498.34/221,107.72
  6. Step 6: Final answer
    x = 180,007.87

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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.