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Finding the Fourth Proportional to 277,731.50, 416,668.30 and 80,739.50

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Solution

The fourth proportional to 277,731.50, 416,668.30 and 80,739.50 is: 121,129.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    277,731.50 : 416,668.30 = 80,739.50 : x
  2. Step 2: Convert to fraction form
    277,731.50/416,668.30 = 80,739.50/x
  3. Step 3: Cross multiply
    277,731.50x = 416,668.30 × 80,739.50
  4. Step 4: Simplify right side
    277,731.50x = 33,641,590,207.85
  5. Step 5: Solve for x
    x = 33,641,590,207.85/277,731.50
  6. Step 6: Final answer
    x = 121,129.90

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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.