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Finding the Fourth Proportional to 138,885.43, 191,694.26 and 98,611.82

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Solution

The fourth proportional to 138,885.43, 191,694.26 and 98,611.82 is: 136,107.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,885.43 : 191,694.26 = 98,611.82 : x
  2. Step 2: Convert to fraction form
    138,885.43/191,694.26 = 98,611.82/x
  3. Step 3: Cross multiply
    138,885.43x = 191,694.26 × 98,611.82
  4. Step 4: Simplify right side
    138,885.43x = 18,903,319,862.15
  5. Step 5: Solve for x
    x = 18,903,319,862.15/138,885.43
  6. Step 6: Final answer
    x = 136,107.30

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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.