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Finding the Fourth Proportional to 171,982.80, 257,974.20 and 129,992.40

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Solution

The fourth proportional to 171,982.80, 257,974.20 and 129,992.40 is: 194,988.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,982.80 : 257,974.20 = 129,992.40 : x
  2. Step 2: Convert to fraction form
    171,982.80/257,974.20 = 129,992.40/x
  3. Step 3: Cross multiply
    171,982.80x = 257,974.20 × 129,992.40
  4. Step 4: Simplify right side
    171,982.80x = 33,534,685,396.08
  5. Step 5: Solve for x
    x = 33,534,685,396.08/171,982.80
  6. Step 6: Final answer
    x = 194,988.60

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Similar ratio
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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.