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Finding the Fourth Proportional to 129,672.72, 194,509.08 and 67,212

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Solution

The fourth proportional to 129,672.72, 194,509.08 and 67,212 is: 100,818.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,672.72 : 194,509.08 = 67,212 : x
  2. Step 2: Convert to fraction form
    129,672.72/194,509.08 = 67,212/x
  3. Step 3: Cross multiply
    129,672.72x = 194,509.08 × 67,212
  4. Step 4: Simplify right side
    129,672.72x = 13,073,344,284.96
  5. Step 5: Solve for x
    x = 13,073,344,284.96/129,672.72
  6. Step 6: Final answer
    x = 100,818.00

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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.