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Finding the Fourth Proportional to 86,697.20, 129,948.60 and 36,768.80

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Solution

The fourth proportional to 86,697.20, 129,948.60 and 36,768.80 is: 55,111.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,697.20 : 129,948.60 = 36,768.80 : x
  2. Step 2: Convert to fraction form
    86,697.20/129,948.60 = 36,768.80/x
  3. Step 3: Cross multiply
    86,697.20x = 129,948.60 × 36,768.80
  4. Step 4: Simplify right side
    86,697.20x = 4,778,054,083.68
  5. Step 5: Solve for x
    x = 4,778,054,083.68/86,697.20
  6. Step 6: Final answer
    x = 55,111.98

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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.