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Finding the Fourth Proportional to 77,991.40, 116,987.10 and 44,698.60

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Solution

The fourth proportional to 77,991.40, 116,987.10 and 44,698.60 is: 67,047.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,991.40 : 116,987.10 = 44,698.60 : x
  2. Step 2: Convert to fraction form
    77,991.40/116,987.10 = 44,698.60/x
  3. Step 3: Cross multiply
    77,991.40x = 116,987.10 × 44,698.60
  4. Step 4: Simplify right side
    77,991.40x = 5,229,159,588.06
  5. Step 5: Solve for x
    x = 5,229,159,588.06/77,991.40
  6. Step 6: Final answer
    x = 67,047.90

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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.