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Finding the Fourth Proportional to 72,388.51, 108,545.73 and 30,257.09

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Solution

The fourth proportional to 72,388.51, 108,545.73 and 30,257.09 is: 45,370.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,388.51 : 108,545.73 = 30,257.09 : x
  2. Step 2: Convert to fraction form
    72,388.51/108,545.73 = 30,257.09/x
  3. Step 3: Cross multiply
    72,388.51x = 108,545.73 × 30,257.09
  4. Step 4: Simplify right side
    72,388.51x = 3,284,277,899.51
  5. Step 5: Solve for x
    x = 3,284,277,899.51/72,388.51
  6. Step 6: Final answer
    x = 45,370.16

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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.