Home / 102,728.44-141,670.38-78,856.12

Finding the Fourth Proportional to 102,728.44, 141,670.38 and 78,856.12

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Solution

The fourth proportional to 102,728.44, 141,670.38 and 78,856.12 is: 108,748.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,728.44 : 141,670.38 = 78,856.12 : x
  2. Step 2: Convert to fraction form
    102,728.44/141,670.38 = 78,856.12/x
  3. Step 3: Cross multiply
    102,728.44x = 141,670.38 × 78,856.12
  4. Step 4: Simplify right side
    102,728.44x = 11,171,576,485.73
  5. Step 5: Solve for x
    x = 11,171,576,485.73/102,728.44
  6. Step 6: Final answer
    x = 108,748.62

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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.