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Finding the Fourth Proportional to 74,168.40, 111,203.46 and 40,904.40

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Solution

The fourth proportional to 74,168.40, 111,203.46 and 40,904.40 is: 61,329.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,168.40 : 111,203.46 = 40,904.40 : x
  2. Step 2: Convert to fraction form
    74,168.40/111,203.46 = 40,904.40/x
  3. Step 3: Cross multiply
    74,168.40x = 111,203.46 × 40,904.40
  4. Step 4: Simplify right side
    74,168.40x = 4,548,710,809.22
  5. Step 5: Solve for x
    x = 4,548,710,809.22/74,168.40
  6. Step 6: Final answer
    x = 61,329.50

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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.