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Finding the Fourth Proportional to 74,907.70, 103,371.92 and 40,916.17

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Solution

The fourth proportional to 74,907.70, 103,371.92 and 40,916.17 is: 56,463.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,907.70 : 103,371.92 = 40,916.17 : x
  2. Step 2: Convert to fraction form
    74,907.70/103,371.92 = 40,916.17/x
  3. Step 3: Cross multiply
    74,907.70x = 103,371.92 × 40,916.17
  4. Step 4: Simplify right side
    74,907.70x = 4,229,582,588.94
  5. Step 5: Solve for x
    x = 4,229,582,588.94/74,907.70
  6. Step 6: Final answer
    x = 56,463.92

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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.