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Finding the Fourth Proportional to 73,976.40, 111,083.40 and 68,518.80

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Solution

The fourth proportional to 73,976.40, 111,083.40 and 68,518.80 is: 102,888.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,976.40 : 111,083.40 = 68,518.80 : x
  2. Step 2: Convert to fraction form
    73,976.40/111,083.40 = 68,518.80/x
  3. Step 3: Cross multiply
    73,976.40x = 111,083.40 × 68,518.80
  4. Step 4: Simplify right side
    73,976.40x = 7,611,301,267.92
  5. Step 5: Solve for x
    x = 7,611,301,267.92/73,976.40
  6. Step 6: Final answer
    x = 102,888.24

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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.