Home / 105,676.05-145,972.68-78,771.81

Finding the Fourth Proportional to 105,676.05, 145,972.68 and 78,771.81

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Solution

The fourth proportional to 105,676.05, 145,972.68 and 78,771.81 is: 108,809.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,676.05 : 145,972.68 = 78,771.81 : x
  2. Step 2: Convert to fraction form
    105,676.05/145,972.68 = 78,771.81/x
  3. Step 3: Cross multiply
    105,676.05x = 145,972.68 × 78,771.81
  4. Step 4: Simplify right side
    105,676.05x = 11,498,532,214.15
  5. Step 5: Solve for x
    x = 11,498,532,214.15/105,676.05
  6. Step 6: Final answer
    x = 108,809.25

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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.