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Finding the Fourth Proportional to 72,371.04, 99,791.64 and 45,481.20

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Solution

The fourth proportional to 72,371.04, 99,791.64 and 45,481.20 is: 62,713.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,371.04 : 99,791.64 = 45,481.20 : x
  2. Step 2: Convert to fraction form
    72,371.04/99,791.64 = 45,481.20/x
  3. Step 3: Cross multiply
    72,371.04x = 99,791.64 × 45,481.20
  4. Step 4: Simplify right side
    72,371.04x = 4,538,643,537.17
  5. Step 5: Solve for x
    x = 4,538,643,537.17/72,371.04
  6. Step 6: Final answer
    x = 62,713.53

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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.