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Finding the Fourth Proportional to 114,640.70, 171,961.05 and 86,647.10

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Solution

The fourth proportional to 114,640.70, 171,961.05 and 86,647.10 is: 129,970.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    114,640.70 : 171,961.05 = 86,647.10 : x
  2. Step 2: Convert to fraction form
    114,640.70/171,961.05 = 86,647.10/x
  3. Step 3: Cross multiply
    114,640.70x = 171,961.05 × 86,647.10
  4. Step 4: Simplify right side
    114,640.70x = 14,899,926,295.46
  5. Step 5: Solve for x
    x = 14,899,926,295.46/114,640.70
  6. Step 6: Final answer
    x = 129,970.65

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Similar ratio
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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.