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Finding the Fourth Proportional to 86,143.88, 129,215.83 and 26,984.16

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Solution

The fourth proportional to 86,143.88, 129,215.83 and 26,984.16 is: 40,476.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,143.88 : 129,215.83 = 26,984.16 : x
  2. Step 2: Convert to fraction form
    86,143.88/129,215.83 = 26,984.16/x
  3. Step 3: Cross multiply
    86,143.88x = 129,215.83 × 26,984.16
  4. Step 4: Simplify right side
    86,143.88x = 3,486,780,563.79
  5. Step 5: Solve for x
    x = 3,486,780,563.79/86,143.88
  6. Step 6: Final answer
    x = 40,476.24

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Similar ratio
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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.