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Finding the Fourth Proportional to 220,513.16, 304,321.44 and 129,929.50

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Solution

The fourth proportional to 220,513.16, 304,321.44 and 129,929.50 is: 179,310.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,513.16 : 304,321.44 = 129,929.50 : x
  2. Step 2: Convert to fraction form
    220,513.16/304,321.44 = 129,929.50/x
  3. Step 3: Cross multiply
    220,513.16x = 304,321.44 × 129,929.50
  4. Step 4: Simplify right side
    220,513.16x = 39,540,332,538.48
  5. Step 5: Solve for x
    x = 39,540,332,538.48/220,513.16
  6. Step 6: Final answer
    x = 179,310.53

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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.