Home / 129,405.60-194,229.90-66,272.58

Finding the Fourth Proportional to 129,405.60, 194,229.90 and 66,272.58

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Solution

The fourth proportional to 129,405.60, 194,229.90 and 66,272.58 is: 99,471.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,405.60 : 194,229.90 = 66,272.58 : x
  2. Step 2: Convert to fraction form
    129,405.60/194,229.90 = 66,272.58/x
  3. Step 3: Cross multiply
    129,405.60x = 194,229.90 × 66,272.58
  4. Step 4: Simplify right side
    129,405.60x = 12,872,116,586.14
  5. Step 5: Solve for x
    x = 12,872,116,586.14/129,405.60
  6. Step 6: Final answer
    x = 99,471.09

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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.