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Finding the Fourth Proportional to 80,515.92, 120,231.69 and 65,754.12

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Solution

The fourth proportional to 80,515.92, 120,231.69 and 65,754.12 is: 98,188.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,515.92 : 120,231.69 = 65,754.12 : x
  2. Step 2: Convert to fraction form
    80,515.92/120,231.69 = 65,754.12/x
  3. Step 3: Cross multiply
    80,515.92x = 120,231.69 × 65,754.12
  4. Step 4: Simplify right side
    80,515.92x = 7,905,728,972.06
  5. Step 5: Solve for x
    x = 7,905,728,972.06/80,515.92
  6. Step 6: Final answer
    x = 98,188.40

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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.