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Finding the Fourth Proportional to 100,999.12, 139,372.84 and 57,968.68

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Solution

The fourth proportional to 100,999.12, 139,372.84 and 57,968.68 is: 79,993.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,999.12 : 139,372.84 = 57,968.68 : x
  2. Step 2: Convert to fraction form
    100,999.12/139,372.84 = 57,968.68/x
  3. Step 3: Cross multiply
    100,999.12x = 139,372.84 × 57,968.68
  4. Step 4: Simplify right side
    100,999.12x = 8,079,259,562.65
  5. Step 5: Solve for x
    x = 8,079,259,562.65/100,999.12
  6. Step 6: Final answer
    x = 79,993.37

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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.