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Finding the Fourth Proportional to 80,512.20, 120,768.30 and 61,828.20

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Solution

The fourth proportional to 80,512.20, 120,768.30 and 61,828.20 is: 92,742.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,512.20 : 120,768.30 = 61,828.20 : x
  2. Step 2: Convert to fraction form
    80,512.20/120,768.30 = 61,828.20/x
  3. Step 3: Cross multiply
    80,512.20x = 120,768.30 × 61,828.20
  4. Step 4: Simplify right side
    80,512.20x = 7,466,886,606.06
  5. Step 5: Solve for x
    x = 7,466,886,606.06/80,512.20
  6. Step 6: Final answer
    x = 92,742.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.