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Finding the Fourth Proportional to 71,449.97, 98,602.95 and 39,186.09

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Solution

The fourth proportional to 71,449.97, 98,602.95 and 39,186.09 is: 54,077.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,449.97 : 98,602.95 = 39,186.09 : x
  2. Step 2: Convert to fraction form
    71,449.97/98,602.95 = 39,186.09/x
  3. Step 3: Cross multiply
    71,449.97x = 98,602.95 × 39,186.09
  4. Step 4: Simplify right side
    71,449.97x = 3,863,863,403.97
  5. Step 5: Solve for x
    x = 3,863,863,403.97/71,449.97
  6. Step 6: Final answer
    x = 54,077.88

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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.