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Finding the Fourth Proportional to 111,307.72, 153,620.40 and 68,879.92

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Solution

The fourth proportional to 111,307.72, 153,620.40 and 68,879.92 is: 95,064.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,307.72 : 153,620.40 = 68,879.92 : x
  2. Step 2: Convert to fraction form
    111,307.72/153,620.40 = 68,879.92/x
  3. Step 3: Cross multiply
    111,307.72x = 153,620.40 × 68,879.92
  4. Step 4: Simplify right side
    111,307.72x = 10,581,360,862.37
  5. Step 5: Solve for x
    x = 10,581,360,862.37/111,307.72
  6. Step 6: Final answer
    x = 95,064.03

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1.5x scale

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.