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Finding the Fourth Proportional to 74,712.66, 103,097.25 and 42,874.80

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Solution

The fourth proportional to 74,712.66, 103,097.25 and 42,874.80 is: 59,163.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,712.66 : 103,097.25 = 42,874.80 : x
  2. Step 2: Convert to fraction form
    74,712.66/103,097.25 = 42,874.80/x
  3. Step 3: Cross multiply
    74,712.66x = 103,097.25 × 42,874.80
  4. Step 4: Simplify right side
    74,712.66x = 4,420,273,974.30
  5. Step 5: Solve for x
    x = 4,420,273,974.30/74,712.66
  6. Step 6: Final answer
    x = 59,163.65

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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.