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Finding the Fourth Proportional to 218,122.70, 326,941.05 and 84,958.70

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Solution

The fourth proportional to 218,122.70, 326,941.05 and 84,958.70 is: 127,343.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,122.70 : 326,941.05 = 84,958.70 : x
  2. Step 2: Convert to fraction form
    218,122.70/326,941.05 = 84,958.70/x
  3. Step 3: Cross multiply
    218,122.70x = 326,941.05 × 84,958.70
  4. Step 4: Simplify right side
    218,122.70x = 27,776,486,584.64
  5. Step 5: Solve for x
    x = 27,776,486,584.64/218,122.70
  6. Step 6: Final answer
    x = 127,343.40

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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.