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Finding the Fourth Proportional to 86,458.70, 129,699.39 and 33,861.35

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Solution

The fourth proportional to 86,458.70, 129,699.39 and 33,861.35 is: 50,796.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,458.70 : 129,699.39 = 33,861.35 : x
  2. Step 2: Convert to fraction form
    86,458.70/129,699.39 = 33,861.35/x
  3. Step 3: Cross multiply
    86,458.70x = 129,699.39 × 33,861.35
  4. Step 4: Simplify right side
    86,458.70x = 4,391,795,621.77
  5. Step 5: Solve for x
    x = 4,391,795,621.77/86,458.70
  6. Step 6: Final answer
    x = 50,796.46

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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.