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Finding the Fourth Proportional to 74,559.78, 102,890.97 and 40,568.94

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Solution

The fourth proportional to 74,559.78, 102,890.97 and 40,568.94 is: 55,984.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,559.78 : 102,890.97 = 40,568.94 : x
  2. Step 2: Convert to fraction form
    74,559.78/102,890.97 = 40,568.94/x
  3. Step 3: Cross multiply
    74,559.78x = 102,890.97 × 40,568.94
  4. Step 4: Simplify right side
    74,559.78x = 4,174,177,588.47
  5. Step 5: Solve for x
    x = 4,174,177,588.47/74,559.78
  6. Step 6: Final answer
    x = 55,984.31

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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.