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Finding the Fourth Proportional to 171,813.72, 257,633.10 and 66,662.76

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Solution

The fourth proportional to 171,813.72, 257,633.10 and 66,662.76 is: 99,960.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,813.72 : 257,633.10 = 66,662.76 : x
  2. Step 2: Convert to fraction form
    171,813.72/257,633.10 = 66,662.76/x
  3. Step 3: Cross multiply
    171,813.72x = 257,633.10 × 66,662.76
  4. Step 4: Simplify right side
    171,813.72x = 17,174,533,513.36
  5. Step 5: Solve for x
    x = 17,174,533,513.36/171,813.72
  6. Step 6: Final answer
    x = 99,960.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.