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Finding the Fourth Proportional to 68,388, 94,427.28 and 66,141.60

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Solution

The fourth proportional to 68,388, 94,427.28 and 66,141.60 is: 91,325.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,388 : 94,427.28 = 66,141.60 : x
  2. Step 2: Convert to fraction form
    68,388/94,427.28 = 66,141.60/x
  3. Step 3: Cross multiply
    68,388x = 94,427.28 × 66,141.60
  4. Step 4: Simplify right side
    68,388x = 6,245,571,382.85
  5. Step 5: Solve for x
    x = 6,245,571,382.85/68,388
  6. Step 6: Final answer
    x = 91,325.55

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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.