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Finding the Fourth Proportional to 191,995.20, 287,992.80 and 129,009.60

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Solution

The fourth proportional to 191,995.20, 287,992.80 and 129,009.60 is: 193,514.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,995.20 : 287,992.80 = 129,009.60 : x
  2. Step 2: Convert to fraction form
    191,995.20/287,992.80 = 129,009.60/x
  3. Step 3: Cross multiply
    191,995.20x = 287,992.80 × 129,009.60
  4. Step 4: Simplify right side
    191,995.20x = 37,153,835,930.88
  5. Step 5: Solve for x
    x = 37,153,835,930.88/191,995.20
  6. Step 6: Final answer
    x = 193,514.40

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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.