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Finding the Fourth Proportional to 218,136.60, 327,140.10 and 84,940.20

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Solution

The fourth proportional to 218,136.60, 327,140.10 and 84,940.20 is: 127,385.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,136.60 : 327,140.10 = 84,940.20 : x
  2. Step 2: Convert to fraction form
    218,136.60/327,140.10 = 84,940.20/x
  3. Step 3: Cross multiply
    218,136.60x = 327,140.10 × 84,940.20
  4. Step 4: Simplify right side
    218,136.60x = 27,787,345,522.02
  5. Step 5: Solve for x
    x = 27,787,345,522.02/218,136.60
  6. Step 6: Final answer
    x = 127,385.07

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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.