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Finding the Fourth Proportional to 109,739.20, 164,608.80 and 30,866.80

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Solution

The fourth proportional to 109,739.20, 164,608.80 and 30,866.80 is: 46,300.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,739.20 : 164,608.80 = 30,866.80 : x
  2. Step 2: Convert to fraction form
    109,739.20/164,608.80 = 30,866.80/x
  3. Step 3: Cross multiply
    109,739.20x = 164,608.80 × 30,866.80
  4. Step 4: Simplify right side
    109,739.20x = 5,080,946,907.84
  5. Step 5: Solve for x
    x = 5,080,946,907.84/109,739.20
  6. Step 6: Final answer
    x = 46,300.20

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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.