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Finding the Fourth Proportional to 57,196.78, 78,768.36 and 51,482.86

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Solution

The fourth proportional to 57,196.78, 78,768.36 and 51,482.86 is: 70,899.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,196.78 : 78,768.36 = 51,482.86 : x
  2. Step 2: Convert to fraction form
    57,196.78/78,768.36 = 51,482.86/x
  3. Step 3: Cross multiply
    57,196.78x = 78,768.36 × 51,482.86
  4. Step 4: Simplify right side
    57,196.78x = 4,055,220,450.31
  5. Step 5: Solve for x
    x = 4,055,220,450.31/57,196.78
  6. Step 6: Final answer
    x = 70,899.45

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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.