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Finding the Fourth Proportional to 86,872.68, 119,810.30 and 66,778.20

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Solution

The fourth proportional to 86,872.68, 119,810.30 and 66,778.20 is: 92,097.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,872.68 : 119,810.30 = 66,778.20 : x
  2. Step 2: Convert to fraction form
    86,872.68/119,810.30 = 66,778.20/x
  3. Step 3: Cross multiply
    86,872.68x = 119,810.30 × 66,778.20
  4. Step 4: Simplify right side
    86,872.68x = 8,000,716,175.46
  5. Step 5: Solve for x
    x = 8,000,716,175.46/86,872.68
  6. Step 6: Final answer
    x = 92,097.03

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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.