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Finding the Fourth Proportional to 64,403.91, 96,619.53 and 19,426.63

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Solution

The fourth proportional to 64,403.91, 96,619.53 and 19,426.63 is: 29,144.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,403.91 : 96,619.53 = 19,426.63 : x
  2. Step 2: Convert to fraction form
    64,403.91/96,619.53 = 19,426.63/x
  3. Step 3: Cross multiply
    64,403.91x = 96,619.53 × 19,426.63
  4. Step 4: Simplify right side
    64,403.91x = 1,876,991,860.08
  5. Step 5: Solve for x
    x = 1,876,991,860.08/64,403.91
  6. Step 6: Final answer
    x = 29,144.07

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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.