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Finding the Fourth Proportional to 68,615.68, 102,985.03 and 57,440.97

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Solution

The fourth proportional to 68,615.68, 102,985.03 and 57,440.97 is: 86,212.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,615.68 : 102,985.03 = 57,440.97 : x
  2. Step 2: Convert to fraction form
    68,615.68/102,985.03 = 57,440.97/x
  3. Step 3: Cross multiply
    68,615.68x = 102,985.03 × 57,440.97
  4. Step 4: Simplify right side
    68,615.68x = 5,915,559,488.88
  5. Step 5: Solve for x
    x = 5,915,559,488.88/68,615.68
  6. Step 6: Final answer
    x = 86,212.94

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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.