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Finding the Fourth Proportional to 61,312.80, 91,920.60 and 33,610.80

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Solution

The fourth proportional to 61,312.80, 91,920.60 and 33,610.80 is: 50,389.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,312.80 : 91,920.60 = 33,610.80 : x
  2. Step 2: Convert to fraction form
    61,312.80/91,920.60 = 33,610.80/x
  3. Step 3: Cross multiply
    61,312.80x = 91,920.60 × 33,610.80
  4. Step 4: Simplify right side
    61,312.80x = 3,089,524,902.48
  5. Step 5: Solve for x
    x = 3,089,524,902.48/61,312.80
  6. Step 6: Final answer
    x = 50,389.56

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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.