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Finding the Fourth Proportional to 74,660.48, 103,028.50 and 40,668.43

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Solution

The fourth proportional to 74,660.48, 103,028.50 and 40,668.43 is: 56,120.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,660.48 : 103,028.50 = 40,668.43 : x
  2. Step 2: Convert to fraction form
    74,660.48/103,028.50 = 40,668.43/x
  3. Step 3: Cross multiply
    74,660.48x = 103,028.50 × 40,668.43
  4. Step 4: Simplify right side
    74,660.48x = 4,190,007,340.26
  5. Step 5: Solve for x
    x = 4,190,007,340.26/74,660.48
  6. Step 6: Final answer
    x = 56,120.82

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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.