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Finding the Fourth Proportional to 220,581, 330,345 and 126,889.92

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Solution

The fourth proportional to 220,581, 330,345 and 126,889.92 is: 190,032.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,581 : 330,345 = 126,889.92 : x
  2. Step 2: Convert to fraction form
    220,581/330,345 = 126,889.92/x
  3. Step 3: Cross multiply
    220,581x = 330,345 × 126,889.92
  4. Step 4: Simplify right side
    220,581x = 41,917,450,622.40
  5. Step 5: Solve for x
    x = 41,917,450,622.40/220,581
  6. Step 6: Final answer
    x = 190,032.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.