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Finding the Fourth Proportional to 78,413.67, 117,618.68 and 19,249.25

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Solution

The fourth proportional to 78,413.67, 117,618.68 and 19,249.25 is: 28,873.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,413.67 : 117,618.68 = 19,249.25 : x
  2. Step 2: Convert to fraction form
    78,413.67/117,618.68 = 19,249.25/x
  3. Step 3: Cross multiply
    78,413.67x = 117,618.68 × 19,249.25
  4. Step 4: Simplify right side
    78,413.67x = 2,264,070,836.02
  5. Step 5: Solve for x
    x = 2,264,070,836.02/78,413.67
  6. Step 6: Final answer
    x = 28,873.42

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1.5x scale

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.