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Finding the Fourth Proportional to 72,662.78, 108,993.48 and 43,059.32

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Solution

The fourth proportional to 72,662.78, 108,993.48 and 43,059.32 is: 64,588.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,662.78 : 108,993.48 = 43,059.32 : x
  2. Step 2: Convert to fraction form
    72,662.78/108,993.48 = 43,059.32/x
  3. Step 3: Cross multiply
    72,662.78x = 108,993.48 × 43,059.32
  4. Step 4: Simplify right side
    72,662.78x = 4,693,185,133.23
  5. Step 5: Solve for x
    x = 4,693,185,133.23/72,662.78
  6. Step 6: Final answer
    x = 64,588.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.