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Finding the Fourth Proportional to 68,690.66, 94,794.07 and 40,009.57

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Solution

The fourth proportional to 68,690.66, 94,794.07 and 40,009.57 is: 55,213.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,690.66 : 94,794.07 = 40,009.57 : x
  2. Step 2: Convert to fraction form
    68,690.66/94,794.07 = 40,009.57/x
  3. Step 3: Cross multiply
    68,690.66x = 94,794.07 × 40,009.57
  4. Step 4: Simplify right side
    68,690.66x = 3,792,669,979.25
  5. Step 5: Solve for x
    x = 3,792,669,979.25/68,690.66
  6. Step 6: Final answer
    x = 55,213.77

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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.