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Finding the Fourth Proportional to 78,807.44, 108,730.64 and 51,940.32

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Solution

The fourth proportional to 78,807.44, 108,730.64 and 51,940.32 is: 71,662.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,807.44 : 108,730.64 = 51,940.32 : x
  2. Step 2: Convert to fraction form
    78,807.44/108,730.64 = 51,940.32/x
  3. Step 3: Cross multiply
    78,807.44x = 108,730.64 × 51,940.32
  4. Step 4: Simplify right side
    78,807.44x = 5,647,504,235.40
  5. Step 5: Solve for x
    x = 5,647,504,235.40/78,807.44
  6. Step 6: Final answer
    x = 71,662.07

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1.5x scale

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.