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Finding the Fourth Proportional to 74,570.36, 102,903.96 and 40,578.98

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Solution

The fourth proportional to 74,570.36, 102,903.96 and 40,578.98 is: 55,997.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,570.36 : 102,903.96 = 40,578.98 : x
  2. Step 2: Convert to fraction form
    74,570.36/102,903.96 = 40,578.98/x
  3. Step 3: Cross multiply
    74,570.36x = 102,903.96 × 40,578.98
  4. Step 4: Simplify right side
    74,570.36x = 4,175,737,734.76
  5. Step 5: Solve for x
    x = 4,175,737,734.76/74,570.36
  6. Step 6: Final answer
    x = 55,997.29

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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.