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Finding the Fourth Proportional to 71,973.75, 99,320.31 and 39,266.22

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Solution

The fourth proportional to 71,973.75, 99,320.31 and 39,266.22 is: 54,185.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,973.75 : 99,320.31 = 39,266.22 : x
  2. Step 2: Convert to fraction form
    71,973.75/99,320.31 = 39,266.22/x
  3. Step 3: Cross multiply
    71,973.75x = 99,320.31 × 39,266.22
  4. Step 4: Simplify right side
    71,973.75x = 3,899,932,450.00
  5. Step 5: Solve for x
    x = 3,899,932,450.00/71,973.75
  6. Step 6: Final answer
    x = 54,185.48

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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.