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Finding the Fourth Proportional to 72,929.22, 109,591.47 and 39,673.86

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Solution

The fourth proportional to 72,929.22, 109,591.47 and 39,673.86 is: 59,618.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,929.22 : 109,591.47 = 39,673.86 : x
  2. Step 2: Convert to fraction form
    72,929.22/109,591.47 = 39,673.86/x
  3. Step 3: Cross multiply
    72,929.22x = 109,591.47 × 39,673.86
  4. Step 4: Simplify right side
    72,929.22x = 4,347,916,637.97
  5. Step 5: Solve for x
    x = 4,347,916,637.97/72,929.22
  6. Step 6: Final answer
    x = 59,618.31

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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.