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Finding the Fourth Proportional to 72,583.90, 100,205.31 and 43,908.28

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Solution

The fourth proportional to 72,583.90, 100,205.31 and 43,908.28 is: 60,617.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,583.90 : 100,205.31 = 43,908.28 : x
  2. Step 2: Convert to fraction form
    72,583.90/100,205.31 = 43,908.28/x
  3. Step 3: Cross multiply
    72,583.90x = 100,205.31 × 43,908.28
  4. Step 4: Simplify right side
    72,583.90x = 4,399,842,808.97
  5. Step 5: Solve for x
    x = 4,399,842,808.97/72,583.90
  6. Step 6: Final answer
    x = 60,617.34

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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.