Home / 80,875.32-121,324.32-28,272.84

Finding the Fourth Proportional to 80,875.32, 121,324.32 and 28,272.84

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Solution

The fourth proportional to 80,875.32, 121,324.32 and 28,272.84 is: 42,413.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,875.32 : 121,324.32 = 28,272.84 : x
  2. Step 2: Convert to fraction form
    80,875.32/121,324.32 = 28,272.84/x
  3. Step 3: Cross multiply
    80,875.32x = 121,324.32 × 28,272.84
  4. Step 4: Simplify right side
    80,875.32x = 3,430,183,087.47
  5. Step 5: Solve for x
    x = 3,430,183,087.47/80,875.32
  6. Step 6: Final answer
    x = 42,413.22

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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.