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Finding the Fourth Proportional to 287,109.54, 430,664.44 and 129,153.44

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Solution

The fourth proportional to 287,109.54, 430,664.44 and 129,153.44 is: 193,730.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,109.54 : 430,664.44 = 129,153.44 : x
  2. Step 2: Convert to fraction form
    287,109.54/430,664.44 = 129,153.44/x
  3. Step 3: Cross multiply
    287,109.54x = 430,664.44 × 129,153.44
  4. Step 4: Simplify right side
    287,109.54x = 55,621,793,911.67
  5. Step 5: Solve for x
    x = 55,621,793,911.67/287,109.54
  6. Step 6: Final answer
    x = 193,730.22

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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.