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Finding the Fourth Proportional to 128,065.44, 176,719.20 and 82,745.28

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Solution

The fourth proportional to 128,065.44, 176,719.20 and 82,745.28 is: 114,181.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,065.44 : 176,719.20 = 82,745.28 : x
  2. Step 2: Convert to fraction form
    128,065.44/176,719.20 = 82,745.28/x
  3. Step 3: Cross multiply
    128,065.44x = 176,719.20 × 82,745.28
  4. Step 4: Simplify right side
    128,065.44x = 14,622,679,685.38
  5. Step 5: Solve for x
    x = 14,622,679,685.38/128,065.44
  6. Step 6: Final answer
    x = 114,181.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.