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Finding the Fourth Proportional to 156,635.84, 216,157.68 and 85,015.88

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Solution

The fourth proportional to 156,635.84, 216,157.68 and 85,015.88 is: 117,322.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,635.84 : 216,157.68 = 85,015.88 : x
  2. Step 2: Convert to fraction form
    156,635.84/216,157.68 = 85,015.88/x
  3. Step 3: Cross multiply
    156,635.84x = 216,157.68 × 85,015.88
  4. Step 4: Simplify right side
    156,635.84x = 18,376,835,383.96
  5. Step 5: Solve for x
    x = 18,376,835,383.96/156,635.84
  6. Step 6: Final answer
    x = 117,322.03

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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.