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Finding the Fourth Proportional to 118,815.86, 178,223.79 and 39,930.09

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Solution

The fourth proportional to 118,815.86, 178,223.79 and 39,930.09 is: 59,895.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,815.86 : 178,223.79 = 39,930.09 : x
  2. Step 2: Convert to fraction form
    118,815.86/178,223.79 = 39,930.09/x
  3. Step 3: Cross multiply
    118,815.86x = 178,223.79 × 39,930.09
  4. Step 4: Simplify right side
    118,815.86x = 7,116,491,083.72
  5. Step 5: Solve for x
    x = 7,116,491,083.72/118,815.86
  6. Step 6: Final answer
    x = 59,895.13

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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.