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Finding the Fourth Proportional to 78,072.78, 107,755.02 and 44,538.78

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Solution

The fourth proportional to 78,072.78, 107,755.02 and 44,538.78 is: 61,471.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,072.78 : 107,755.02 = 44,538.78 : x
  2. Step 2: Convert to fraction form
    78,072.78/107,755.02 = 44,538.78/x
  3. Step 3: Cross multiply
    78,072.78x = 107,755.02 × 44,538.78
  4. Step 4: Simplify right side
    78,072.78x = 4,799,277,129.68
  5. Step 5: Solve for x
    x = 4,799,277,129.68/78,072.78
  6. Step 6: Final answer
    x = 61,471.84

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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.