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Finding the Fourth Proportional to 74,781.92, 112,194.07 and 30,440.49

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Solution

The fourth proportional to 74,781.92, 112,194.07 and 30,440.49 is: 45,669.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,781.92 : 112,194.07 = 30,440.49 : x
  2. Step 2: Convert to fraction form
    74,781.92/112,194.07 = 30,440.49/x
  3. Step 3: Cross multiply
    74,781.92x = 112,194.07 × 30,440.49
  4. Step 4: Simplify right side
    74,781.92x = 3,415,242,465.89
  5. Step 5: Solve for x
    x = 3,415,242,465.89/74,781.92
  6. Step 6: Final answer
    x = 45,669.36

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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.