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Finding the Fourth Proportional to 220,648.14, 330,904.17 and 115,409.70

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Solution

The fourth proportional to 220,648.14, 330,904.17 and 115,409.70 is: 173,078.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,648.14 : 330,904.17 = 115,409.70 : x
  2. Step 2: Convert to fraction form
    220,648.14/330,904.17 = 115,409.70/x
  3. Step 3: Cross multiply
    220,648.14x = 330,904.17 × 115,409.70
  4. Step 4: Simplify right side
    220,648.14x = 38,189,550,988.45
  5. Step 5: Solve for x
    x = 38,189,550,988.45/220,648.14
  6. Step 6: Final answer
    x = 173,078.96

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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.