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Finding the Fourth Proportional to 171,857.09, 257,752.24 and 86,445.20

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Solution

The fourth proportional to 171,857.09, 257,752.24 and 86,445.20 is: 129,651.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,857.09 : 257,752.24 = 86,445.20 : x
  2. Step 2: Convert to fraction form
    171,857.09/257,752.24 = 86,445.20/x
  3. Step 3: Cross multiply
    171,857.09x = 257,752.24 × 86,445.20
  4. Step 4: Simplify right side
    171,857.09x = 22,281,443,937.25
  5. Step 5: Solve for x
    x = 22,281,443,937.25/171,857.09
  6. Step 6: Final answer
    x = 129,651.00

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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.