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Finding the Fourth Proportional to 69,980.76, 104,971.68 and 25,608.96

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Solution

The fourth proportional to 69,980.76, 104,971.68 and 25,608.96 is: 38,413.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,980.76 : 104,971.68 = 25,608.96 : x
  2. Step 2: Convert to fraction form
    69,980.76/104,971.68 = 25,608.96/x
  3. Step 3: Cross multiply
    69,980.76x = 104,971.68 × 25,608.96
  4. Step 4: Simplify right side
    69,980.76x = 2,688,215,554.25
  5. Step 5: Solve for x
    x = 2,688,215,554.25/69,980.76
  6. Step 6: Final answer
    x = 38,413.64

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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.