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Finding the Fourth Proportional to 66,583.80, 99,861.30 and 29,143.80

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Solution

The fourth proportional to 66,583.80, 99,861.30 and 29,143.80 is: 43,709.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,583.80 : 99,861.30 = 29,143.80 : x
  2. Step 2: Convert to fraction form
    66,583.80/99,861.30 = 29,143.80/x
  3. Step 3: Cross multiply
    66,583.80x = 99,861.30 × 29,143.80
  4. Step 4: Simplify right side
    66,583.80x = 2,910,337,754.94
  5. Step 5: Solve for x
    x = 2,910,337,754.94/66,583.80
  6. Step 6: Final answer
    x = 43,709.40

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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.