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Finding the Fourth Proportional to 108,976.76, 163,206.80 and 69,413.93

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Solution

The fourth proportional to 108,976.76, 163,206.80 and 69,413.93 is: 103,956.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,976.76 : 163,206.80 = 69,413.93 : x
  2. Step 2: Convert to fraction form
    108,976.76/163,206.80 = 69,413.93/x
  3. Step 3: Cross multiply
    108,976.76x = 163,206.80 × 69,413.93
  4. Step 4: Simplify right side
    108,976.76x = 11,328,825,099.95
  5. Step 5: Solve for x
    x = 11,328,825,099.95/108,976.76
  6. Step 6: Final answer
    x = 103,956.34

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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.