Home / 213,413.12-319,865.33-99,407.96

Finding the Fourth Proportional to 213,413.12, 319,865.33 and 99,407.96

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Solution

The fourth proportional to 213,413.12, 319,865.33 and 99,407.96 is: 148,993.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,413.12 : 319,865.33 = 99,407.96 : x
  2. Step 2: Convert to fraction form
    213,413.12/319,865.33 = 99,407.96/x
  3. Step 3: Cross multiply
    213,413.12x = 319,865.33 × 99,407.96
  4. Step 4: Simplify right side
    213,413.12x = 31,797,158,579.22
  5. Step 5: Solve for x
    x = 31,797,158,579.22/213,413.12
  6. Step 6: Final answer
    x = 148,993.46

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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.