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Finding the Fourth Proportional to 74,919, 103,389.30 and 41,385

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Solution

The fourth proportional to 74,919, 103,389.30 and 41,385 is: 57,111.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,919 : 103,389.30 = 41,385 : x
  2. Step 2: Convert to fraction form
    74,919/103,389.30 = 41,385/x
  3. Step 3: Cross multiply
    74,919x = 103,389.30 × 41,385
  4. Step 4: Simplify right side
    74,919x = 4,278,766,180.50
  5. Step 5: Solve for x
    x = 4,278,766,180.50/74,919
  6. Step 6: Final answer
    x = 57,111.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.