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Finding the Fourth Proportional to 72,305.22, 108,443.25 and 19,707.87

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Solution

The fourth proportional to 72,305.22, 108,443.25 and 19,707.87 is: 29,557.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,305.22 : 108,443.25 = 19,707.87 : x
  2. Step 2: Convert to fraction form
    72,305.22/108,443.25 = 19,707.87/x
  3. Step 3: Cross multiply
    72,305.22x = 108,443.25 × 19,707.87
  4. Step 4: Simplify right side
    72,305.22x = 2,137,185,473.38
  5. Step 5: Solve for x
    x = 2,137,185,473.38/72,305.22
  6. Step 6: Final answer
    x = 29,557.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.