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Finding the Fourth Proportional to 86,681.90, 119,540.97 and 66,539.63

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Solution

The fourth proportional to 86,681.90, 119,540.97 and 66,539.63 is: 91,763.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,681.90 : 119,540.97 = 66,539.63 : x
  2. Step 2: Convert to fraction form
    86,681.90/119,540.97 = 66,539.63/x
  3. Step 3: Cross multiply
    86,681.90x = 119,540.97 × 66,539.63
  4. Step 4: Simplify right side
    86,681.90x = 7,954,212,212.49
  5. Step 5: Solve for x
    x = 7,954,212,212.49/86,681.90
  6. Step 6: Final answer
    x = 91,763.24

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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.