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Finding the Fourth Proportional to 129,778.29, 194,573.91 and 79,754.97

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Solution

The fourth proportional to 129,778.29, 194,573.91 and 79,754.97 is: 119,574.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,778.29 : 194,573.91 = 79,754.97 : x
  2. Step 2: Convert to fraction form
    129,778.29/194,573.91 = 79,754.97/x
  3. Step 3: Cross multiply
    129,778.29x = 194,573.91 × 79,754.97
  4. Step 4: Simplify right side
    129,778.29x = 15,518,236,354.83
  5. Step 5: Solve for x
    x = 15,518,236,354.83/129,778.29
  6. Step 6: Final answer
    x = 119,574.98

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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.