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Finding the Fourth Proportional to 86,173.96, 128,629.33 and 79,841.56

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Solution

The fourth proportional to 86,173.96, 128,629.33 and 79,841.56 is: 119,177.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,173.96 : 128,629.33 = 79,841.56 : x
  2. Step 2: Convert to fraction form
    86,173.96/128,629.33 = 79,841.56/x
  3. Step 3: Cross multiply
    86,173.96x = 128,629.33 × 79,841.56
  4. Step 4: Simplify right side
    86,173.96x = 10,269,966,368.95
  5. Step 5: Solve for x
    x = 10,269,966,368.95/86,173.96
  6. Step 6: Final answer
    x = 119,177.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.