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Finding the Fourth Proportional to 136,868.91, 188,997.99 and 85,970.13

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Solution

The fourth proportional to 136,868.91, 188,997.99 and 85,970.13 is: 118,713.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,868.91 : 188,997.99 = 85,970.13 : x
  2. Step 2: Convert to fraction form
    136,868.91/188,997.99 = 85,970.13/x
  3. Step 3: Cross multiply
    136,868.91x = 188,997.99 × 85,970.13
  4. Step 4: Simplify right side
    136,868.91x = 16,248,181,770.04
  5. Step 5: Solve for x
    x = 16,248,181,770.04/136,868.91
  6. Step 6: Final answer
    x = 118,713.46

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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.