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Finding the Fourth Proportional to 72,309.94, 99,797.10 and 40,485.44

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Solution

The fourth proportional to 72,309.94, 99,797.10 and 40,485.44 is: 55,875.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,309.94 : 99,797.10 = 40,485.44 : x
  2. Step 2: Convert to fraction form
    72,309.94/99,797.10 = 40,485.44/x
  3. Step 3: Cross multiply
    72,309.94x = 99,797.10 × 40,485.44
  4. Step 4: Simplify right side
    72,309.94x = 4,040,329,504.22
  5. Step 5: Solve for x
    x = 4,040,329,504.22/72,309.94
  6. Step 6: Final answer
    x = 55,875.16

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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.