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Finding the Fourth Proportional to 86,698.20, 129,950.10 and 36,769.80

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Solution

The fourth proportional to 86,698.20, 129,950.10 and 36,769.80 is: 55,113.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,698.20 : 129,950.10 = 36,769.80 : x
  2. Step 2: Convert to fraction form
    86,698.20/129,950.10 = 36,769.80/x
  3. Step 3: Cross multiply
    86,698.20x = 129,950.10 × 36,769.80
  4. Step 4: Simplify right side
    86,698.20x = 4,778,239,186.98
  5. Step 5: Solve for x
    x = 4,778,239,186.98/86,698.20
  6. Step 6: Final answer
    x = 55,113.48

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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.