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Finding the Fourth Proportional to 220,618.16, 330,817.92 and 78,442.13

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Solution

The fourth proportional to 220,618.16, 330,817.92 and 78,442.13 is: 117,624.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,618.16 : 330,817.92 = 78,442.13 : x
  2. Step 2: Convert to fraction form
    220,618.16/330,817.92 = 78,442.13/x
  3. Step 3: Cross multiply
    220,618.16x = 330,817.92 × 78,442.13
  4. Step 4: Simplify right side
    220,618.16x = 25,950,062,286.97
  5. Step 5: Solve for x
    x = 25,950,062,286.97/220,618.16
  6. Step 6: Final answer
    x = 117,624.33

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1.5x scale

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.