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Finding the Fourth Proportional to 48,739.80, 73,128.90 and 19,152.60

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Solution

The fourth proportional to 48,739.80, 73,128.90 and 19,152.60 is: 28,736.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,739.80 : 73,128.90 = 19,152.60 : x
  2. Step 2: Convert to fraction form
    48,739.80/73,128.90 = 19,152.60/x
  3. Step 3: Cross multiply
    48,739.80x = 73,128.90 × 19,152.60
  4. Step 4: Simplify right side
    48,739.80x = 1,400,608,570.14
  5. Step 5: Solve for x
    x = 1,400,608,570.14/48,739.80
  6. Step 6: Final answer
    x = 28,736.44

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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.