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Finding the Fourth Proportional to 74,474.40, 102,773.52 and 40,939.68

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Solution

The fourth proportional to 74,474.40, 102,773.52 and 40,939.68 is: 56,496.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,474.40 : 102,773.52 = 40,939.68 : x
  2. Step 2: Convert to fraction form
    74,474.40/102,773.52 = 40,939.68/x
  3. Step 3: Cross multiply
    74,474.40x = 102,773.52 × 40,939.68
  4. Step 4: Simplify right side
    74,474.40x = 4,207,515,021.27
  5. Step 5: Solve for x
    x = 4,207,515,021.27/74,474.40
  6. Step 6: Final answer
    x = 56,496.13

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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.