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Finding the Fourth Proportional to 72,513.76, 108,781.74 and 39,238.54

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Solution

The fourth proportional to 72,513.76, 108,781.74 and 39,238.54 is: 58,863.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,513.76 : 108,781.74 = 39,238.54 : x
  2. Step 2: Convert to fraction form
    72,513.76/108,781.74 = 39,238.54/x
  3. Step 3: Cross multiply
    72,513.76x = 108,781.74 × 39,238.54
  4. Step 4: Simplify right side
    72,513.76x = 4,268,436,656.26
  5. Step 5: Solve for x
    x = 4,268,436,656.26/72,513.76
  6. Step 6: Final answer
    x = 58,863.82

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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.