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Finding the Fourth Proportional to 81,413.30, 122,119.04 and 28,810.49

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Solution

The fourth proportional to 81,413.30, 122,119.04 and 28,810.49 is: 43,215.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,413.30 : 122,119.04 = 28,810.49 : x
  2. Step 2: Convert to fraction form
    81,413.30/122,119.04 = 28,810.49/x
  3. Step 3: Cross multiply
    81,413.30x = 122,119.04 × 28,810.49
  4. Step 4: Simplify right side
    81,413.30x = 3,518,308,842.16
  5. Step 5: Solve for x
    x = 3,518,308,842.16/81,413.30
  6. Step 6: Final answer
    x = 43,215.41

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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.