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Finding the Fourth Proportional to 68,369.67, 102,406.84 and 66,696.61

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Solution

The fourth proportional to 68,369.67, 102,406.84 and 66,696.61 is: 99,900.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,369.67 : 102,406.84 = 66,696.61 : x
  2. Step 2: Convert to fraction form
    68,369.67/102,406.84 = 66,696.61/x
  3. Step 3: Cross multiply
    68,369.67x = 102,406.84 × 66,696.61
  4. Step 4: Simplify right side
    68,369.67x = 6,830,189,068.81
  5. Step 5: Solve for x
    x = 6,830,189,068.81/68,369.67
  6. Step 6: Final answer
    x = 99,900.86

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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.