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Finding the Fourth Proportional to 53,986.40, 80,944.40 and 48,456.80

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Solution

The fourth proportional to 53,986.40, 80,944.40 and 48,456.80 is: 72,653.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,986.40 : 80,944.40 = 48,456.80 : x
  2. Step 2: Convert to fraction form
    53,986.40/80,944.40 = 48,456.80/x
  3. Step 3: Cross multiply
    53,986.40x = 80,944.40 × 48,456.80
  4. Step 4: Simplify right side
    53,986.40x = 3,922,306,601.92
  5. Step 5: Solve for x
    x = 3,922,306,601.92/53,986.40
  6. Step 6: Final answer
    x = 72,653.61

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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.