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Finding the Fourth Proportional to 129,879.48, 194,830.35 and 45,632.39

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Solution

The fourth proportional to 129,879.48, 194,830.35 and 45,632.39 is: 68,452.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,879.48 : 194,830.35 = 45,632.39 : x
  2. Step 2: Convert to fraction form
    129,879.48/194,830.35 = 45,632.39/x
  3. Step 3: Cross multiply
    129,879.48x = 194,830.35 × 45,632.39
  4. Step 4: Simplify right side
    129,879.48x = 8,890,573,540.88
  5. Step 5: Solve for x
    x = 8,890,573,540.88/129,879.48
  6. Step 6: Final answer
    x = 68,452.49

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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.