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Finding the Fourth Proportional to 172,078.60, 257,607.60 and 127,901.20

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Solution

The fourth proportional to 172,078.60, 257,607.60 and 127,901.20 is: 191,472.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,078.60 : 257,607.60 = 127,901.20 : x
  2. Step 2: Convert to fraction form
    172,078.60/257,607.60 = 127,901.20/x
  3. Step 3: Cross multiply
    172,078.60x = 257,607.60 × 127,901.20
  4. Step 4: Simplify right side
    172,078.60x = 32,948,321,169.12
  5. Step 5: Solve for x
    x = 32,948,321,169.12/172,078.60
  6. Step 6: Final answer
    x = 191,472.51

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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.