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Finding the Fourth Proportional to 100,631.94, 138,873.71 and 57,611.26

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Solution

The fourth proportional to 100,631.94, 138,873.71 and 57,611.26 is: 79,504.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,631.94 : 138,873.71 = 57,611.26 : x
  2. Step 2: Convert to fraction form
    100,631.94/138,873.71 = 57,611.26/x
  3. Step 3: Cross multiply
    100,631.94x = 138,873.71 × 57,611.26
  4. Step 4: Simplify right side
    100,631.94x = 8,000,689,413.97
  5. Step 5: Solve for x
    x = 8,000,689,413.97/100,631.94
  6. Step 6: Final answer
    x = 79,504.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.