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Finding the Fourth Proportional to 111,424.68, 153,755.28 and 63,668.16

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Solution

The fourth proportional to 111,424.68, 153,755.28 and 63,668.16 is: 87,855.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,424.68 : 153,755.28 = 63,668.16 : x
  2. Step 2: Convert to fraction form
    111,424.68/153,755.28 = 63,668.16/x
  3. Step 3: Cross multiply
    111,424.68x = 153,755.28 × 63,668.16
  4. Step 4: Simplify right side
    111,424.68x = 9,789,315,767.88
  5. Step 5: Solve for x
    x = 9,789,315,767.88/111,424.68
  6. Step 6: Final answer
    x = 87,855.90

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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.