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Finding the Fourth Proportional to 69,409.80, 104,090.40 and 36,118.80

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Solution

The fourth proportional to 69,409.80, 104,090.40 and 36,118.80 is: 54,165.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,409.80 : 104,090.40 = 36,118.80 : x
  2. Step 2: Convert to fraction form
    69,409.80/104,090.40 = 36,118.80/x
  3. Step 3: Cross multiply
    69,409.80x = 104,090.40 × 36,118.80
  4. Step 4: Simplify right side
    69,409.80x = 3,759,620,339.52
  5. Step 5: Solve for x
    x = 3,759,620,339.52/69,409.80
  6. Step 6: Final answer
    x = 54,165.56

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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.