Home / 81,378.38-122,066.65-28,775.56

Finding the Fourth Proportional to 81,378.38, 122,066.65 and 28,775.56

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Solution

The fourth proportional to 81,378.38, 122,066.65 and 28,775.56 is: 43,163.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,378.38 : 122,066.65 = 28,775.56 : x
  2. Step 2: Convert to fraction form
    81,378.38/122,066.65 = 28,775.56/x
  3. Step 3: Cross multiply
    81,378.38x = 122,066.65 × 28,775.56
  4. Step 4: Simplify right side
    81,378.38x = 3,512,536,166.40
  5. Step 5: Solve for x
    x = 3,512,536,166.40/81,378.38
  6. Step 6: Final answer
    x = 43,163.02

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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.