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Finding the Fourth Proportional to 70,296.45, 105,441.60 and 20,375.46

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Solution

The fourth proportional to 70,296.45, 105,441.60 and 20,375.46 is: 30,562.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,296.45 : 105,441.60 = 20,375.46 : x
  2. Step 2: Convert to fraction form
    70,296.45/105,441.60 = 20,375.46/x
  3. Step 3: Cross multiply
    70,296.45x = 105,441.60 × 20,375.46
  4. Step 4: Simplify right side
    70,296.45x = 2,148,421,103.14
  5. Step 5: Solve for x
    x = 2,148,421,103.14/70,296.45
  6. Step 6: Final answer
    x = 30,562.30

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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.