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Finding the Fourth Proportional to 111,194.40, 153,290.16 and 68,728.80

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Solution

The fourth proportional to 111,194.40, 153,290.16 and 68,728.80 is: 94,748.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,194.40 : 153,290.16 = 68,728.80 : x
  2. Step 2: Convert to fraction form
    111,194.40/153,290.16 = 68,728.80/x
  3. Step 3: Cross multiply
    111,194.40x = 153,290.16 × 68,728.80
  4. Step 4: Simplify right side
    111,194.40x = 10,535,448,748.61
  5. Step 5: Solve for x
    x = 10,535,448,748.61/111,194.40
  6. Step 6: Final answer
    x = 94,748.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.