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Finding the Fourth Proportional to 70,765.85, 97,657.04 and 38,936.80

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Solution

The fourth proportional to 70,765.85, 97,657.04 and 38,936.80 is: 53,732.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,765.85 : 97,657.04 = 38,936.80 : x
  2. Step 2: Convert to fraction form
    70,765.85/97,657.04 = 38,936.80/x
  3. Step 3: Cross multiply
    70,765.85x = 97,657.04 × 38,936.80
  4. Step 4: Simplify right side
    70,765.85x = 3,802,452,635.07
  5. Step 5: Solve for x
    x = 3,802,452,635.07/70,765.85
  6. Step 6: Final answer
    x = 53,732.88

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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.