Home / 74,780.31-103,198.06-40,788.80

Finding the Fourth Proportional to 74,780.31, 103,198.06 and 40,788.80

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Solution

The fourth proportional to 74,780.31, 103,198.06 and 40,788.80 is: 56,289.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,780.31 : 103,198.06 = 40,788.80 : x
  2. Step 2: Convert to fraction form
    74,780.31/103,198.06 = 40,788.80/x
  3. Step 3: Cross multiply
    74,780.31x = 103,198.06 × 40,788.80
  4. Step 4: Simplify right side
    74,780.31x = 4,209,324,951.72
  5. Step 5: Solve for x
    x = 4,209,324,951.72/74,780.31
  6. Step 6: Final answer
    x = 56,289.21

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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.