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Finding the Fourth Proportional to 31,093.80, 46,640.70 and 28,080.60

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Solution

The fourth proportional to 31,093.80, 46,640.70 and 28,080.60 is: 42,120.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,093.80 : 46,640.70 = 28,080.60 : x
  2. Step 2: Convert to fraction form
    31,093.80/46,640.70 = 28,080.60/x
  3. Step 3: Cross multiply
    31,093.80x = 46,640.70 × 28,080.60
  4. Step 4: Simplify right side
    31,093.80x = 1,309,698,840.42
  5. Step 5: Solve for x
    x = 1,309,698,840.42/31,093.80
  6. Step 6: Final answer
    x = 42,120.90

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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.