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Finding the Fourth Proportional to 321,105.60, 481,312.80 and 121,348.80

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Solution

The fourth proportional to 321,105.60, 481,312.80 and 121,348.80 is: 181,892.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,105.60 : 481,312.80 = 121,348.80 : x
  2. Step 2: Convert to fraction form
    321,105.60/481,312.80 = 121,348.80/x
  3. Step 3: Cross multiply
    321,105.60x = 481,312.80 × 121,348.80
  4. Step 4: Simplify right side
    321,105.60x = 58,406,730,704.64
  5. Step 5: Solve for x
    x = 58,406,730,704.64/321,105.60
  6. Step 6: Final answer
    x = 181,892.59

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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.