Home / 80,942.40-121,413.60-25,531.20

Finding the Fourth Proportional to 80,942.40, 121,413.60 and 25,531.20

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Solution

The fourth proportional to 80,942.40, 121,413.60 and 25,531.20 is: 38,296.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,942.40 : 121,413.60 = 25,531.20 : x
  2. Step 2: Convert to fraction form
    80,942.40/121,413.60 = 25,531.20/x
  3. Step 3: Cross multiply
    80,942.40x = 121,413.60 × 25,531.20
  4. Step 4: Simplify right side
    80,942.40x = 3,099,834,904.32
  5. Step 5: Solve for x
    x = 3,099,834,904.32/80,942.40
  6. Step 6: Final answer
    x = 38,296.80

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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.