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Finding the Fourth Proportional to 319,778.55, 479,414.79 and 120,076.68

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Solution

The fourth proportional to 319,778.55, 479,414.79 and 120,076.68 is: 180,020.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,778.55 : 479,414.79 = 120,076.68 : x
  2. Step 2: Convert to fraction form
    319,778.55/479,414.79 = 120,076.68/x
  3. Step 3: Cross multiply
    319,778.55x = 479,414.79 × 120,076.68
  4. Step 4: Simplify right side
    319,778.55x = 57,566,536,326.10
  5. Step 5: Solve for x
    x = 57,566,536,326.10/319,778.55
  6. Step 6: Final answer
    x = 180,020.01

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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.