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Finding the Fourth Proportional to 74,840.89, 103,279.62 and 40,849.11

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Solution

The fourth proportional to 74,840.89, 103,279.62 and 40,849.11 is: 56,371.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,840.89 : 103,279.62 = 40,849.11 : x
  2. Step 2: Convert to fraction form
    74,840.89/103,279.62 = 40,849.11/x
  3. Step 3: Cross multiply
    74,840.89x = 103,279.62 × 40,849.11
  4. Step 4: Simplify right side
    74,840.89x = 4,218,880,558.14
  5. Step 5: Solve for x
    x = 4,218,880,558.14/74,840.89
  6. Step 6: Final answer
    x = 56,371.33

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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.