Home / 80,948.21-121,413.60-21,789.86

Finding the Fourth Proportional to 80,948.21, 121,413.60 and 21,789.86

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Solution

The fourth proportional to 80,948.21, 121,413.60 and 21,789.86 is: 32,682.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,948.21 : 121,413.60 = 21,789.86 : x
  2. Step 2: Convert to fraction form
    80,948.21/121,413.60 = 21,789.86/x
  3. Step 3: Cross multiply
    80,948.21x = 121,413.60 × 21,789.86
  4. Step 4: Simplify right side
    80,948.21x = 2,645,584,739.03
  5. Step 5: Solve for x
    x = 2,645,584,739.03/80,948.21
  6. Step 6: Final answer
    x = 32,682.44

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1.5x scale

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.