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Finding the Fourth Proportional to 139,611.78, 209,414.94 and 39,772.62

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Solution

The fourth proportional to 139,611.78, 209,414.94 and 39,772.62 is: 59,658.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,611.78 : 209,414.94 = 39,772.62 : x
  2. Step 2: Convert to fraction form
    139,611.78/209,414.94 = 39,772.62/x
  3. Step 3: Cross multiply
    139,611.78x = 209,414.94 × 39,772.62
  4. Step 4: Simplify right side
    139,611.78x = 8,328,980,830.94
  5. Step 5: Solve for x
    x = 8,328,980,830.94/139,611.78
  6. Step 6: Final answer
    x = 59,658.15

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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.