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Finding the Fourth Proportional to 70,311.42, 105,481.23 and 25,938.40

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Solution

The fourth proportional to 70,311.42, 105,481.23 and 25,938.40 is: 38,912.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,311.42 : 105,481.23 = 25,938.40 : x
  2. Step 2: Convert to fraction form
    70,311.42/105,481.23 = 25,938.40/x
  3. Step 3: Cross multiply
    70,311.42x = 105,481.23 × 25,938.40
  4. Step 4: Simplify right side
    70,311.42x = 2,736,014,336.23
  5. Step 5: Solve for x
    x = 2,736,014,336.23/70,311.42
  6. Step 6: Final answer
    x = 38,912.80

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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.