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Finding the Fourth Proportional to 82,861.72, 124,203.06 and 40,692.76

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Solution

The fourth proportional to 82,861.72, 124,203.06 and 40,692.76 is: 60,995.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,861.72 : 124,203.06 = 40,692.76 : x
  2. Step 2: Convert to fraction form
    82,861.72/124,203.06 = 40,692.76/x
  3. Step 3: Cross multiply
    82,861.72x = 124,203.06 × 40,692.76
  4. Step 4: Simplify right side
    82,861.72x = 5,054,165,311.85
  5. Step 5: Solve for x
    x = 5,054,165,311.85/82,861.72
  6. Step 6: Final answer
    x = 60,995.18

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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.