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Finding the Fourth Proportional to 321,009.20, 481,571.40 and 134,039.60

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Solution

The fourth proportional to 321,009.20, 481,571.40 and 134,039.60 is: 201,083.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,009.20 : 481,571.40 = 134,039.60 : x
  2. Step 2: Convert to fraction form
    321,009.20/481,571.40 = 134,039.60/x
  3. Step 3: Cross multiply
    321,009.20x = 481,571.40 × 134,039.60
  4. Step 4: Simplify right side
    321,009.20x = 64,549,637,827.44
  5. Step 5: Solve for x
    x = 64,549,637,827.44/321,009.20
  6. Step 6: Final answer
    x = 201,083.45

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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.