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Finding the Fourth Proportional to 157,574.21, 217,455.45 and 85,956.85

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Solution

The fourth proportional to 157,574.21, 217,455.45 and 85,956.85 is: 118,622.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,574.21 : 217,455.45 = 85,956.85 : x
  2. Step 2: Convert to fraction form
    157,574.21/217,455.45 = 85,956.85/x
  3. Step 3: Cross multiply
    157,574.21x = 217,455.45 × 85,956.85
  4. Step 4: Simplify right side
    157,574.21x = 18,691,784,410.06
  5. Step 5: Solve for x
    x = 18,691,784,410.06/157,574.21
  6. Step 6: Final answer
    x = 118,622.10

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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.