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Finding the Fourth Proportional to 129,960.72, 194,634 and 63,446.40

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Solution

The fourth proportional to 129,960.72, 194,634 and 63,446.40 is: 95,019.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,960.72 : 194,634 = 63,446.40 : x
  2. Step 2: Convert to fraction form
    129,960.72/194,634 = 63,446.40/x
  3. Step 3: Cross multiply
    129,960.72x = 194,634 × 63,446.40
  4. Step 4: Simplify right side
    129,960.72x = 12,348,826,617.60
  5. Step 5: Solve for x
    x = 12,348,826,617.60/129,960.72
  6. Step 6: Final answer
    x = 95,019.68

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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.