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Finding the Fourth Proportional to 85,129.84, 117,283.44 and 67,218.22

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Solution

The fourth proportional to 85,129.84, 117,283.44 and 67,218.22 is: 92,606.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,129.84 : 117,283.44 = 67,218.22 : x
  2. Step 2: Convert to fraction form
    85,129.84/117,283.44 = 67,218.22/x
  3. Step 3: Cross multiply
    85,129.84x = 117,283.44 × 67,218.22
  4. Step 4: Simplify right side
    85,129.84x = 7,883,584,072.28
  5. Step 5: Solve for x
    x = 7,883,584,072.28/85,129.84
  6. Step 6: Final answer
    x = 92,606.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.