Home / 218,208.89-301,138.47-121,413.28

Finding the Fourth Proportional to 218,208.89, 301,138.47 and 121,413.28

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Solution

The fourth proportional to 218,208.89, 301,138.47 and 121,413.28 is: 167,556.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,208.89 : 301,138.47 = 121,413.28 : x
  2. Step 2: Convert to fraction form
    218,208.89/301,138.47 = 121,413.28/x
  3. Step 3: Cross multiply
    218,208.89x = 301,138.47 × 121,413.28
  4. Step 4: Simplify right side
    218,208.89x = 36,562,209,376.88
  5. Step 5: Solve for x
    x = 36,562,209,376.88/218,208.89
  6. Step 6: Final answer
    x = 167,556.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.