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Finding the Fourth Proportional to 103,391.62, 155,078.79 and 41,045.38

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Solution

The fourth proportional to 103,391.62, 155,078.79 and 41,045.38 is: 61,564.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,391.62 : 155,078.79 = 41,045.38 : x
  2. Step 2: Convert to fraction form
    103,391.62/155,078.79 = 41,045.38/x
  3. Step 3: Cross multiply
    103,391.62x = 155,078.79 × 41,045.38
  4. Step 4: Simplify right side
    103,391.62x = 6,365,267,865.49
  5. Step 5: Solve for x
    x = 6,365,267,865.49/103,391.62
  6. Step 6: Final answer
    x = 61,564.64

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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.