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Finding the Fourth Proportional to 68,615.55, 102,984.84 and 57,440.84

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Solution

The fourth proportional to 68,615.55, 102,984.84 and 57,440.84 is: 86,212.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,615.55 : 102,984.84 = 57,440.84 : x
  2. Step 2: Convert to fraction form
    68,615.55/102,984.84 = 57,440.84/x
  3. Step 3: Cross multiply
    68,615.55x = 102,984.84 × 57,440.84
  4. Step 4: Simplify right side
    68,615.55x = 5,915,535,716.87
  5. Step 5: Solve for x
    x = 5,915,535,716.87/68,615.55
  6. Step 6: Final answer
    x = 86,212.76

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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.