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Finding the Fourth Proportional to 72,233.97, 99,685.80 and 39,968.02

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Solution

The fourth proportional to 72,233.97, 99,685.80 and 39,968.02 is: 55,157.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,233.97 : 99,685.80 = 39,968.02 : x
  2. Step 2: Convert to fraction form
    72,233.97/99,685.80 = 39,968.02/x
  3. Step 3: Cross multiply
    72,233.97x = 99,685.80 × 39,968.02
  4. Step 4: Simplify right side
    72,233.97x = 3,984,244,048.12
  5. Step 5: Solve for x
    x = 3,984,244,048.12/72,233.97
  6. Step 6: Final answer
    x = 55,157.48

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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.