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Finding the Fourth Proportional to 114,674.80, 172,012.20 and 91,055.20

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Solution

The fourth proportional to 114,674.80, 172,012.20 and 91,055.20 is: 136,582.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    114,674.80 : 172,012.20 = 91,055.20 : x
  2. Step 2: Convert to fraction form
    114,674.80/172,012.20 = 91,055.20/x
  3. Step 3: Cross multiply
    114,674.80x = 172,012.20 × 91,055.20
  4. Step 4: Simplify right side
    114,674.80x = 15,662,605,273.44
  5. Step 5: Solve for x
    x = 15,662,605,273.44/114,674.80
  6. Step 6: Final answer
    x = 136,582.80

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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.