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Finding the Fourth Proportional to 212,729.20, 318,940.20 and 119,263.60

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Solution

The fourth proportional to 212,729.20, 318,940.20 and 119,263.60 is: 178,809.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,729.20 : 318,940.20 = 119,263.60 : x
  2. Step 2: Convert to fraction form
    212,729.20/318,940.20 = 119,263.60/x
  3. Step 3: Cross multiply
    212,729.20x = 318,940.20 × 119,263.60
  4. Step 4: Simplify right side
    212,729.20x = 38,037,956,436.72
  5. Step 5: Solve for x
    x = 38,037,956,436.72/212,729.20
  6. Step 6: Final answer
    x = 178,809.29

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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.