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Finding the Fourth Proportional to 220,705.12, 330,979.83 and 70,894.81

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Solution

The fourth proportional to 220,705.12, 330,979.83 and 70,894.81 is: 106,317.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,705.12 : 330,979.83 = 70,894.81 : x
  2. Step 2: Convert to fraction form
    220,705.12/330,979.83 = 70,894.81/x
  3. Step 3: Cross multiply
    220,705.12x = 330,979.83 × 70,894.81
  4. Step 4: Simplify right side
    220,705.12x = 23,464,752,161.68
  5. Step 5: Solve for x
    x = 23,464,752,161.68/220,705.12
  6. Step 6: Final answer
    x = 106,317.21

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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.