Home / 102,942.09-142,062.05-80,306.64

Finding the Fourth Proportional to 102,942.09, 142,062.05 and 80,306.64

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Solution

The fourth proportional to 102,942.09, 142,062.05 and 80,306.64 is: 110,824.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,942.09 : 142,062.05 = 80,306.64 : x
  2. Step 2: Convert to fraction form
    102,942.09/142,062.05 = 80,306.64/x
  3. Step 3: Cross multiply
    102,942.09x = 142,062.05 × 80,306.64
  4. Step 4: Simplify right side
    102,942.09x = 11,408,526,107.78
  5. Step 5: Solve for x
    x = 11,408,526,107.78/102,942.09
  6. Step 6: Final answer
    x = 110,824.70

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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.