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Finding the Fourth Proportional to 78,890.60, 118,163.10 and 68,522.60

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Solution

The fourth proportional to 78,890.60, 118,163.10 and 68,522.60 is: 102,633.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,890.60 : 118,163.10 = 68,522.60 : x
  2. Step 2: Convert to fraction form
    78,890.60/118,163.10 = 68,522.60/x
  3. Step 3: Cross multiply
    78,890.60x = 118,163.10 × 68,522.60
  4. Step 4: Simplify right side
    78,890.60x = 8,096,842,836.06
  5. Step 5: Solve for x
    x = 8,096,842,836.06/78,890.60
  6. Step 6: Final answer
    x = 102,633.81

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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.