Home / 107,918.10-148,756.77-81,021.78

Finding the Fourth Proportional to 107,918.10, 148,756.77 and 81,021.78

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Solution

The fourth proportional to 107,918.10, 148,756.77 and 81,021.78 is: 111,682.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,918.10 : 148,756.77 = 81,021.78 : x
  2. Step 2: Convert to fraction form
    107,918.10/148,756.77 = 81,021.78/x
  3. Step 3: Cross multiply
    107,918.10x = 148,756.77 × 81,021.78
  4. Step 4: Simplify right side
    107,918.10x = 12,052,538,292.45
  5. Step 5: Solve for x
    x = 12,052,538,292.45/107,918.10
  6. Step 6: Final answer
    x = 111,682.27

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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.