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Finding the Fourth Proportional to 48,574.56, 72,879.60 and 20,501.60

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Solution

The fourth proportional to 48,574.56, 72,879.60 and 20,501.60 is: 30,759.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,574.56 : 72,879.60 = 20,501.60 : x
  2. Step 2: Convert to fraction form
    48,574.56/72,879.60 = 20,501.60/x
  3. Step 3: Cross multiply
    48,574.56x = 72,879.60 × 20,501.60
  4. Step 4: Simplify right side
    48,574.56x = 1,494,148,407.36
  5. Step 5: Solve for x
    x = 1,494,148,407.36/48,574.56
  6. Step 6: Final answer
    x = 30,759.90

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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.