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Finding the Fourth Proportional to 70,889.60, 97,827.90 and 39,057.80

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Solution

The fourth proportional to 70,889.60, 97,827.90 and 39,057.80 is: 53,899.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,889.60 : 97,827.90 = 39,057.80 : x
  2. Step 2: Convert to fraction form
    70,889.60/97,827.90 = 39,057.80/x
  3. Step 3: Cross multiply
    70,889.60x = 97,827.90 × 39,057.80
  4. Step 4: Simplify right side
    70,889.60x = 3,820,942,552.62
  5. Step 5: Solve for x
    x = 3,820,942,552.62/70,889.60
  6. Step 6: Final answer
    x = 53,899.90

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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.