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Finding the Fourth Proportional to 68,362.87, 102,396.68 and 66,689.81

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Solution

The fourth proportional to 68,362.87, 102,396.68 and 66,689.81 is: 99,890.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,362.87 : 102,396.68 = 66,689.81 : x
  2. Step 2: Convert to fraction form
    68,362.87/102,396.68 = 66,689.81/x
  3. Step 3: Cross multiply
    68,362.87x = 102,396.68 × 66,689.81
  4. Step 4: Simplify right side
    68,362.87x = 6,828,815,498.45
  5. Step 5: Solve for x
    x = 6,828,815,498.45/68,362.87
  6. Step 6: Final answer
    x = 99,890.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.