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Finding the Fourth Proportional to 86,457.70, 129,697.89 and 33,860.35

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Solution

The fourth proportional to 86,457.70, 129,697.89 and 33,860.35 is: 50,794.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,457.70 : 129,697.89 = 33,860.35 : x
  2. Step 2: Convert to fraction form
    86,457.70/129,697.89 = 33,860.35/x
  3. Step 3: Cross multiply
    86,457.70x = 129,697.89 × 33,860.35
  4. Step 4: Simplify right side
    86,457.70x = 4,391,615,540.77
  5. Step 5: Solve for x
    x = 4,391,615,540.77/86,457.70
  6. Step 6: Final answer
    x = 50,794.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.