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Finding the Fourth Proportional to 218,122.20, 326,940.30 and 84,958.20

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Solution

The fourth proportional to 218,122.20, 326,940.30 and 84,958.20 is: 127,342.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,122.20 : 326,940.30 = 84,958.20 : x
  2. Step 2: Convert to fraction form
    218,122.20/326,940.30 = 84,958.20/x
  3. Step 3: Cross multiply
    218,122.20x = 326,940.30 × 84,958.20
  4. Step 4: Simplify right side
    218,122.20x = 27,776,259,395.46
  5. Step 5: Solve for x
    x = 27,776,259,395.46/218,122.20
  6. Step 6: Final answer
    x = 127,342.65

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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.