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Finding the Fourth Proportional to 104,071.40, 156,251.10 and 66,861.80

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Solution

The fourth proportional to 104,071.40, 156,251.10 and 66,861.80 is: 100,385.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,071.40 : 156,251.10 = 66,861.80 : x
  2. Step 2: Convert to fraction form
    104,071.40/156,251.10 = 66,861.80/x
  3. Step 3: Cross multiply
    104,071.40x = 156,251.10 × 66,861.80
  4. Step 4: Simplify right side
    104,071.40x = 10,447,229,797.98
  5. Step 5: Solve for x
    x = 10,447,229,797.98/104,071.40
  6. Step 6: Final answer
    x = 100,385.21

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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.