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Finding the Fourth Proportional to 70,328.80, 105,544.02 and 27,640.58

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Solution

The fourth proportional to 70,328.80, 105,544.02 and 27,640.58 is: 41,480.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,328.80 : 105,544.02 = 27,640.58 : x
  2. Step 2: Convert to fraction form
    70,328.80/105,544.02 = 27,640.58/x
  3. Step 3: Cross multiply
    70,328.80x = 105,544.02 × 27,640.58
  4. Step 4: Simplify right side
    70,328.80x = 2,917,297,928.33
  5. Step 5: Solve for x
    x = 2,917,297,928.33/70,328.80
  6. Step 6: Final answer
    x = 41,480.84

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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.