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Finding the Fourth Proportional to 29,128.40, 43,606.20 and 25,672.40

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Solution

The fourth proportional to 29,128.40, 43,606.20 and 25,672.40 is: 38,432.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,128.40 : 43,606.20 = 25,672.40 : x
  2. Step 2: Convert to fraction form
    29,128.40/43,606.20 = 25,672.40/x
  3. Step 3: Cross multiply
    29,128.40x = 43,606.20 × 25,672.40
  4. Step 4: Simplify right side
    29,128.40x = 1,119,475,808.88
  5. Step 5: Solve for x
    x = 1,119,475,808.88/29,128.40
  6. Step 6: Final answer
    x = 38,432.45

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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.