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Finding the Fourth Proportional to 321,112.60, 481,323.30 and 121,355.80

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Solution

The fourth proportional to 321,112.60, 481,323.30 and 121,355.80 is: 181,903.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,112.60 : 481,323.30 = 121,355.80 : x
  2. Step 2: Convert to fraction form
    321,112.60/481,323.30 = 121,355.80/x
  3. Step 3: Cross multiply
    321,112.60x = 481,323.30 × 121,355.80
  4. Step 4: Simplify right side
    321,112.60x = 58,411,374,130.14
  5. Step 5: Solve for x
    x = 58,411,374,130.14/321,112.60
  6. Step 6: Final answer
    x = 181,903.09

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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.