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Finding the Fourth Proportional to 86,871.68, 119,808.92 and 66,777.20

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Solution

The fourth proportional to 86,871.68, 119,808.92 and 66,777.20 is: 92,095.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,871.68 : 119,808.92 = 66,777.20 : x
  2. Step 2: Convert to fraction form
    86,871.68/119,808.92 = 66,777.20/x
  3. Step 3: Cross multiply
    86,871.68x = 119,808.92 × 66,777.20
  4. Step 4: Simplify right side
    86,871.68x = 8,000,504,212.62
  5. Step 5: Solve for x
    x = 8,000,504,212.62/86,871.68
  6. Step 6: Final answer
    x = 92,095.65

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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.