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Finding the Fourth Proportional to 138,953.16, 191,758.44 and 81,608.88

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Solution

The fourth proportional to 138,953.16, 191,758.44 and 81,608.88 is: 112,622.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,953.16 : 191,758.44 = 81,608.88 : x
  2. Step 2: Convert to fraction form
    138,953.16/191,758.44 = 81,608.88/x
  3. Step 3: Cross multiply
    138,953.16x = 191,758.44 × 81,608.88
  4. Step 4: Simplify right side
    138,953.16x = 15,649,191,518.95
  5. Step 5: Solve for x
    x = 15,649,191,518.95/138,953.16
  6. Step 6: Final answer
    x = 112,622.06

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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.