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Finding the Fourth Proportional to 74,662.79, 103,034.65 and 41,128.79

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Solution

The fourth proportional to 74,662.79, 103,034.65 and 41,128.79 is: 56,757.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,662.79 : 103,034.65 = 41,128.79 : x
  2. Step 2: Convert to fraction form
    74,662.79/103,034.65 = 41,128.79/x
  3. Step 3: Cross multiply
    74,662.79x = 103,034.65 × 41,128.79
  4. Step 4: Simplify right side
    74,662.79x = 4,237,690,482.57
  5. Step 5: Solve for x
    x = 4,237,690,482.57/74,662.79
  6. Step 6: Final answer
    x = 56,757.73

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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.