Home / 57,000.25-78,658.97-31,157.65

Finding the Fourth Proportional to 57,000.25, 78,658.97 and 31,157.65

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Solution

The fourth proportional to 57,000.25, 78,658.97 and 31,157.65 is: 42,996.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,000.25 : 78,658.97 = 31,157.65 : x
  2. Step 2: Convert to fraction form
    57,000.25/78,658.97 = 31,157.65/x
  3. Step 3: Cross multiply
    57,000.25x = 78,658.97 × 31,157.65
  4. Step 4: Simplify right side
    57,000.25x = 2,450,828,107.54
  5. Step 5: Solve for x
    x = 2,450,828,107.54/57,000.25
  6. Step 6: Final answer
    x = 42,996.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.