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Finding the Fourth Proportional to 253,705.96, 350,099.20 and 138,961.72

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Solution

The fourth proportional to 253,705.96, 350,099.20 and 138,961.72 is: 191,758.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,705.96 : 350,099.20 = 138,961.72 : x
  2. Step 2: Convert to fraction form
    253,705.96/350,099.20 = 138,961.72/x
  3. Step 3: Cross multiply
    253,705.96x = 350,099.20 × 138,961.72
  4. Step 4: Simplify right side
    253,705.96x = 48,650,384,557.32
  5. Step 5: Solve for x
    x = 48,650,384,557.32/253,705.96
  6. Step 6: Final answer
    x = 191,758.94

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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.