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Finding the Fourth Proportional to 68,736, 94,840.32 and 40,442.88

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Solution

The fourth proportional to 68,736, 94,840.32 and 40,442.88 is: 55,802.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,736 : 94,840.32 = 40,442.88 : x
  2. Step 2: Convert to fraction form
    68,736/94,840.32 = 40,442.88/x
  3. Step 3: Cross multiply
    68,736x = 94,840.32 × 40,442.88
  4. Step 4: Simplify right side
    68,736x = 3,835,615,680.92
  5. Step 5: Solve for x
    x = 3,835,615,680.92/68,736
  6. Step 6: Final answer
    x = 55,802.14

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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.