Home / 209,986.80-314,980.20-121,413.30

Finding the Fourth Proportional to 209,986.80, 314,980.20 and 121,413.30

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Solution

The fourth proportional to 209,986.80, 314,980.20 and 121,413.30 is: 182,119.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,986.80 : 314,980.20 = 121,413.30 : x
  2. Step 2: Convert to fraction form
    209,986.80/314,980.20 = 121,413.30/x
  3. Step 3: Cross multiply
    209,986.80x = 314,980.20 × 121,413.30
  4. Step 4: Simplify right side
    209,986.80x = 38,242,785,516.66
  5. Step 5: Solve for x
    x = 38,242,785,516.66/209,986.80
  6. Step 6: Final answer
    x = 182,119.95

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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.