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Finding the Fourth Proportional to 319,615.92, 479,591.32 and 120,074

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Solution

The fourth proportional to 319,615.92, 479,591.32 and 120,074 is: 180,173.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,615.92 : 479,591.32 = 120,074 : x
  2. Step 2: Convert to fraction form
    319,615.92/479,591.32 = 120,074/x
  3. Step 3: Cross multiply
    319,615.92x = 479,591.32 × 120,074
  4. Step 4: Simplify right side
    319,615.92x = 57,586,448,157.68
  5. Step 5: Solve for x
    x = 57,586,448,157.68/319,615.92
  6. Step 6: Final answer
    x = 180,173.90

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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.