Home / 212,413.13-318,620.51-86,055.76

Finding the Fourth Proportional to 212,413.13, 318,620.51 and 86,055.76

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Solution

The fourth proportional to 212,413.13, 318,620.51 and 86,055.76 is: 129,083.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,413.13 : 318,620.51 = 86,055.76 : x
  2. Step 2: Convert to fraction form
    212,413.13/318,620.51 = 86,055.76/x
  3. Step 3: Cross multiply
    212,413.13x = 318,620.51 × 86,055.76
  4. Step 4: Simplify right side
    212,413.13x = 27,419,130,139.64
  5. Step 5: Solve for x
    x = 27,419,130,139.64/212,413.13
  6. Step 6: Final answer
    x = 129,083.97

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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.