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Finding the Fourth Proportional to 171,940.40, 257,910.60 and 98,212.40

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Solution

The fourth proportional to 171,940.40, 257,910.60 and 98,212.40 is: 147,318.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,940.40 : 257,910.60 = 98,212.40 : x
  2. Step 2: Convert to fraction form
    171,940.40/257,910.60 = 98,212.40/x
  3. Step 3: Cross multiply
    171,940.40x = 257,910.60 × 98,212.40
  4. Step 4: Simplify right side
    171,940.40x = 25,330,019,011.44
  5. Step 5: Solve for x
    x = 25,330,019,011.44/171,940.40
  6. Step 6: Final answer
    x = 147,318.60

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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.