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Finding the Fourth Proportional to 86,168.81, 129,252.31 and 33,615.20

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Solution

The fourth proportional to 86,168.81, 129,252.31 and 33,615.20 is: 50,422.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,168.81 : 129,252.31 = 33,615.20 : x
  2. Step 2: Convert to fraction form
    86,168.81/129,252.31 = 33,615.20/x
  3. Step 3: Cross multiply
    86,168.81x = 129,252.31 × 33,615.20
  4. Step 4: Simplify right side
    86,168.81x = 4,344,842,490.20
  5. Step 5: Solve for x
    x = 4,344,842,490.20/86,168.81
  6. Step 6: Final answer
    x = 50,422.45

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Double scale
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1.5x scale

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.