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Finding the Fourth Proportional to 74,131.20, 111,196.80 and 71,506.80

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Solution

The fourth proportional to 74,131.20, 111,196.80 and 71,506.80 is: 107,260.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,131.20 : 111,196.80 = 71,506.80 : x
  2. Step 2: Convert to fraction form
    74,131.20/111,196.80 = 71,506.80/x
  3. Step 3: Cross multiply
    74,131.20x = 111,196.80 × 71,506.80
  4. Step 4: Simplify right side
    74,131.20x = 7,951,327,338.24
  5. Step 5: Solve for x
    x = 7,951,327,338.24/74,131.20
  6. Step 6: Final answer
    x = 107,260.20

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1.5x scale

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.