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Finding the Fourth Proportional to 321,939.81, 482,614.06 and 111,430.53

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Solution

The fourth proportional to 321,939.81, 482,614.06 and 111,430.53 is: 167,043.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,939.81 : 482,614.06 = 111,430.53 : x
  2. Step 2: Convert to fraction form
    321,939.81/482,614.06 = 111,430.53/x
  3. Step 3: Cross multiply
    321,939.81x = 482,614.06 × 111,430.53
  4. Step 4: Simplify right side
    321,939.81x = 53,777,940,491.25
  5. Step 5: Solve for x
    x = 53,777,940,491.25/321,939.81
  6. Step 6: Final answer
    x = 167,043.46

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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.