Home / 85,456.62-128,087.20-53,450.23

Finding the Fourth Proportional to 85,456.62, 128,087.20 and 53,450.23

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Solution

The fourth proportional to 85,456.62, 128,087.20 and 53,450.23 is: 80,114.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,456.62 : 128,087.20 = 53,450.23 : x
  2. Step 2: Convert to fraction form
    85,456.62/128,087.20 = 53,450.23/x
  3. Step 3: Cross multiply
    85,456.62x = 128,087.20 × 53,450.23
  4. Step 4: Simplify right side
    85,456.62x = 6,846,290,136.49
  5. Step 5: Solve for x
    x = 6,846,290,136.49/85,456.62
  6. Step 6: Final answer
    x = 80,114.22

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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.