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Finding the Fourth Proportional to 107,879.26, 148,942.56 and 69,655.90

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Solution

The fourth proportional to 107,879.26, 148,942.56 and 69,655.90 is: 96,169.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,879.26 : 148,942.56 = 69,655.90 : x
  2. Step 2: Convert to fraction form
    107,879.26/148,942.56 = 69,655.90/x
  3. Step 3: Cross multiply
    107,879.26x = 148,942.56 × 69,655.90
  4. Step 4: Simplify right side
    107,879.26x = 10,374,728,065.10
  5. Step 5: Solve for x
    x = 10,374,728,065.10/107,879.26
  6. Step 6: Final answer
    x = 96,169.81

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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.