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Finding the Fourth Proportional to 129,476.92, 194,290.70 and 54,592.40

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Solution

The fourth proportional to 129,476.92, 194,290.70 and 54,592.40 is: 81,920.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,476.92 : 194,290.70 = 54,592.40 : x
  2. Step 2: Convert to fraction form
    129,476.92/194,290.70 = 54,592.40/x
  3. Step 3: Cross multiply
    129,476.92x = 194,290.70 × 54,592.40
  4. Step 4: Simplify right side
    129,476.92x = 10,606,795,610.68
  5. Step 5: Solve for x
    x = 10,606,795,610.68/129,476.92
  6. Step 6: Final answer
    x = 81,920.36

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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.