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Finding the Fourth Proportional to 112,613.30, 168,919.74 and 53,416.64

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Solution

The fourth proportional to 112,613.30, 168,919.74 and 53,416.64 is: 80,124.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,613.30 : 168,919.74 = 53,416.64 : x
  2. Step 2: Convert to fraction form
    112,613.30/168,919.74 = 53,416.64/x
  3. Step 3: Cross multiply
    112,613.30x = 168,919.74 × 53,416.64
  4. Step 4: Simplify right side
    112,613.30x = 9,023,124,940.47
  5. Step 5: Solve for x
    x = 9,023,124,940.47/112,613.30
  6. Step 6: Final answer
    x = 80,124.86

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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.