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Finding the Fourth Proportional to 49,999.40, 68,999.22 and 28,782.80

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Solution

The fourth proportional to 49,999.40, 68,999.22 and 28,782.80 is: 39,720.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,999.40 : 68,999.22 = 28,782.80 : x
  2. Step 2: Convert to fraction form
    49,999.40/68,999.22 = 28,782.80/x
  3. Step 3: Cross multiply
    49,999.40x = 68,999.22 × 28,782.80
  4. Step 4: Simplify right side
    49,999.40x = 1,985,990,749.42
  5. Step 5: Solve for x
    x = 1,985,990,749.42/49,999.40
  6. Step 6: Final answer
    x = 39,720.29

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1.5x scale

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.