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Finding the Fourth Proportional to 74,925.40, 112,388.10 and 71,469.40

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Solution

The fourth proportional to 74,925.40, 112,388.10 and 71,469.40 is: 107,204.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,925.40 : 112,388.10 = 71,469.40 : x
  2. Step 2: Convert to fraction form
    74,925.40/112,388.10 = 71,469.40/x
  3. Step 3: Cross multiply
    74,925.40x = 112,388.10 × 71,469.40
  4. Step 4: Simplify right side
    74,925.40x = 8,032,310,074.14
  5. Step 5: Solve for x
    x = 8,032,310,074.14/74,925.40
  6. Step 6: Final answer
    x = 107,204.10

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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.