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Finding the Fourth Proportional to 129,858.40, 194,787.60 and 73,871.20

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Solution

The fourth proportional to 129,858.40, 194,787.60 and 73,871.20 is: 110,806.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,858.40 : 194,787.60 = 73,871.20 : x
  2. Step 2: Convert to fraction form
    129,858.40/194,787.60 = 73,871.20/x
  3. Step 3: Cross multiply
    129,858.40x = 194,787.60 × 73,871.20
  4. Step 4: Simplify right side
    129,858.40x = 14,389,193,757.12
  5. Step 5: Solve for x
    x = 14,389,193,757.12/129,858.40
  6. Step 6: Final answer
    x = 110,806.80

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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.