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Finding the Fourth Proportional to 50,879.72, 70,216.40 and 31,770.80

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Solution

The fourth proportional to 50,879.72, 70,216.40 and 31,770.80 is: 43,845.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,879.72 : 70,216.40 = 31,770.80 : x
  2. Step 2: Convert to fraction form
    50,879.72/70,216.40 = 31,770.80/x
  3. Step 3: Cross multiply
    50,879.72x = 70,216.40 × 31,770.80
  4. Step 4: Simplify right side
    50,879.72x = 2,230,831,201.12
  5. Step 5: Solve for x
    x = 2,230,831,201.12/50,879.72
  6. Step 6: Final answer
    x = 43,845.19

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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.