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Finding the Fourth Proportional to 107,703.78, 148,645.20 and 61,781.37

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Solution

The fourth proportional to 107,703.78, 148,645.20 and 61,781.37 is: 85,266.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,703.78 : 148,645.20 = 61,781.37 : x
  2. Step 2: Convert to fraction form
    107,703.78/148,645.20 = 61,781.37/x
  3. Step 3: Cross multiply
    107,703.78x = 148,645.20 × 61,781.37
  4. Step 4: Simplify right side
    107,703.78x = 9,183,504,099.92
  5. Step 5: Solve for x
    x = 9,183,504,099.92/107,703.78
  6. Step 6: Final answer
    x = 85,266.31

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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.