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Finding the Fourth Proportional to 321,318.70, 481,643.82 and 107,928.25

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Solution

The fourth proportional to 321,318.70, 481,643.82 and 107,928.25 is: 161,780.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,318.70 : 481,643.82 = 107,928.25 : x
  2. Step 2: Convert to fraction form
    321,318.70/481,643.82 = 107,928.25/x
  3. Step 3: Cross multiply
    321,318.70x = 481,643.82 × 107,928.25
  4. Step 4: Simplify right side
    321,318.70x = 51,982,973,411.81
  5. Step 5: Solve for x
    x = 51,982,973,411.81/321,318.70
  6. Step 6: Final answer
    x = 161,780.11

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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.