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Finding the Fourth Proportional to 129,778.88, 194,574.86 and 79,755.64

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Solution

The fourth proportional to 129,778.88, 194,574.86 and 79,755.64 is: 119,576.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,778.88 : 194,574.86 = 79,755.64 : x
  2. Step 2: Convert to fraction form
    129,778.88/194,574.86 = 79,755.64/x
  3. Step 3: Cross multiply
    129,778.88x = 194,574.86 × 79,755.64
  4. Step 4: Simplify right side
    129,778.88x = 15,518,442,487.21
  5. Step 5: Solve for x
    x = 15,518,442,487.21/129,778.88
  6. Step 6: Final answer
    x = 119,576.02

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1.5x scale

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.