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Finding the Fourth Proportional to 70,608.63, 97,441.60 and 38,778.21

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Solution

The fourth proportional to 70,608.63, 97,441.60 and 38,778.21 is: 53,514.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,608.63 : 97,441.60 = 38,778.21 : x
  2. Step 2: Convert to fraction form
    70,608.63/97,441.60 = 38,778.21/x
  3. Step 3: Cross multiply
    70,608.63x = 97,441.60 × 38,778.21
  4. Step 4: Simplify right side
    70,608.63x = 3,778,610,827.54
  5. Step 5: Solve for x
    x = 3,778,610,827.54/70,608.63
  6. Step 6: Final answer
    x = 53,514.86

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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.