Home / 255,636.06-383,455.04-78,142.38

Finding the Fourth Proportional to 255,636.06, 383,455.04 and 78,142.38

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Solution

The fourth proportional to 255,636.06, 383,455.04 and 78,142.38 is: 117,213.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,636.06 : 383,455.04 = 78,142.38 : x
  2. Step 2: Convert to fraction form
    255,636.06/383,455.04 = 78,142.38/x
  3. Step 3: Cross multiply
    255,636.06x = 383,455.04 × 78,142.38
  4. Step 4: Simplify right side
    255,636.06x = 29,964,089,057.88
  5. Step 5: Solve for x
    x = 29,964,089,057.88/255,636.06
  6. Step 6: Final answer
    x = 117,213.86

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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.