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Finding the Fourth Proportional to 86,144.65, 129,217.01 and 26,984.91

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Solution

The fourth proportional to 86,144.65, 129,217.01 and 26,984.91 is: 40,477.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,144.65 : 129,217.01 = 26,984.91 : x
  2. Step 2: Convert to fraction form
    86,144.65/129,217.01 = 26,984.91/x
  3. Step 3: Cross multiply
    86,144.65x = 129,217.01 × 26,984.91
  4. Step 4: Simplify right side
    86,144.65x = 3,486,909,734.96
  5. Step 5: Solve for x
    x = 3,486,909,734.96/86,144.65
  6. Step 6: Final answer
    x = 40,477.38

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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.