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Finding the Fourth Proportional to 74,568.90, 102,906.32 and 40,578.82

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Solution

The fourth proportional to 74,568.90, 102,906.32 and 40,578.82 is: 55,999.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,568.90 : 102,906.32 = 40,578.82 : x
  2. Step 2: Convert to fraction form
    74,568.90/102,906.32 = 40,578.82/x
  3. Step 3: Cross multiply
    74,568.90x = 102,906.32 × 40,578.82
  4. Step 4: Simplify right side
    74,568.90x = 4,175,816,575.98
  5. Step 5: Solve for x
    x = 4,175,816,575.98/74,568.90
  6. Step 6: Final answer
    x = 55,999.44

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1.5x scale

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.