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Finding the Fourth Proportional to 71,720.71, 98,918.97 and 46,231.22

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Solution

The fourth proportional to 71,720.71, 98,918.97 and 46,231.22 is: 63,763.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,720.71 : 98,918.97 = 46,231.22 : x
  2. Step 2: Convert to fraction form
    71,720.71/98,918.97 = 46,231.22/x
  3. Step 3: Cross multiply
    71,720.71x = 98,918.97 × 46,231.22
  4. Step 4: Simplify right side
    71,720.71x = 4,573,144,998.22
  5. Step 5: Solve for x
    x = 4,573,144,998.22/71,720.71
  6. Step 6: Final answer
    x = 63,763.24

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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.