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Finding the Fourth Proportional to 321,124.87, 481,754.90 and 121,440.79

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Solution

The fourth proportional to 321,124.87, 481,754.90 and 121,440.79 is: 182,186.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,124.87 : 481,754.90 = 121,440.79 : x
  2. Step 2: Convert to fraction form
    321,124.87/481,754.90 = 121,440.79/x
  3. Step 3: Cross multiply
    321,124.87x = 481,754.90 × 121,440.79
  4. Step 4: Simplify right side
    321,124.87x = 58,504,695,642.37
  5. Step 5: Solve for x
    x = 58,504,695,642.37/321,124.87
  6. Step 6: Final answer
    x = 182,186.75

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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.