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Finding the Fourth Proportional to 104,561.80, 156,632.10 and 72,863.80

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Solution

The fourth proportional to 104,561.80, 156,632.10 and 72,863.80 is: 109,148.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,561.80 : 156,632.10 = 72,863.80 : x
  2. Step 2: Convert to fraction form
    104,561.80/156,632.10 = 72,863.80/x
  3. Step 3: Cross multiply
    104,561.80x = 156,632.10 × 72,863.80
  4. Step 4: Simplify right side
    104,561.80x = 11,412,810,007.98
  5. Step 5: Solve for x
    x = 11,412,810,007.98/104,561.80
  6. Step 6: Final answer
    x = 109,148.94

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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.