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Finding the Fourth Proportional to 86,020.98, 128,980.38 and 32,716.86

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Solution

The fourth proportional to 86,020.98, 128,980.38 and 32,716.86 is: 49,055.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,020.98 : 128,980.38 = 32,716.86 : x
  2. Step 2: Convert to fraction form
    86,020.98/128,980.38 = 32,716.86/x
  3. Step 3: Cross multiply
    86,020.98x = 128,980.38 × 32,716.86
  4. Step 4: Simplify right side
    86,020.98x = 4,219,833,035.21
  5. Step 5: Solve for x
    x = 4,219,833,035.21/86,020.98
  6. Step 6: Final answer
    x = 49,055.86

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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.