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Finding the Fourth Proportional to 50,668.86, 69,922.86 and 28,312.86

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Solution

The fourth proportional to 50,668.86, 69,922.86 and 28,312.86 is: 39,071.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,668.86 : 69,922.86 = 28,312.86 : x
  2. Step 2: Convert to fraction form
    50,668.86/69,922.86 = 28,312.86/x
  3. Step 3: Cross multiply
    50,668.86x = 69,922.86 × 28,312.86
  4. Step 4: Simplify right side
    50,668.86x = 1,979,716,145.98
  5. Step 5: Solve for x
    x = 1,979,716,145.98/50,668.86
  6. Step 6: Final answer
    x = 39,071.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.