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Finding the Fourth Proportional to 74,979.33, 103,471.50 and 40,987.97

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Solution

The fourth proportional to 74,979.33, 103,471.50 and 40,987.97 is: 56,563.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,979.33 : 103,471.50 = 40,987.97 : x
  2. Step 2: Convert to fraction form
    74,979.33/103,471.50 = 40,987.97/x
  3. Step 3: Cross multiply
    74,979.33x = 103,471.50 × 40,987.97
  4. Step 4: Simplify right side
    74,979.33x = 4,241,086,737.86
  5. Step 5: Solve for x
    x = 4,241,086,737.86/74,979.33
  6. Step 6: Final answer
    x = 56,563.41

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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.