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Finding the Fourth Proportional to 86,092.44, 128,676.90 and 77,639.64

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Solution

The fourth proportional to 86,092.44, 128,676.90 and 77,639.64 is: 116,043.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,092.44 : 128,676.90 = 77,639.64 : x
  2. Step 2: Convert to fraction form
    86,092.44/128,676.90 = 77,639.64/x
  3. Step 3: Cross multiply
    86,092.44x = 128,676.90 × 77,639.64
  4. Step 4: Simplify right side
    86,092.44x = 9,990,428,192.32
  5. Step 5: Solve for x
    x = 9,990,428,192.32/86,092.44
  6. Step 6: Final answer
    x = 116,043.04

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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.