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Finding the Fourth Proportional to 87,767.80, 131,457.30 and 72,215.80

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Solution

The fourth proportional to 87,767.80, 131,457.30 and 72,215.80 is: 108,163.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,767.80 : 131,457.30 = 72,215.80 : x
  2. Step 2: Convert to fraction form
    87,767.80/131,457.30 = 72,215.80/x
  3. Step 3: Cross multiply
    87,767.80x = 131,457.30 × 72,215.80
  4. Step 4: Simplify right side
    87,767.80x = 9,493,294,085.34
  5. Step 5: Solve for x
    x = 9,493,294,085.34/87,767.80
  6. Step 6: Final answer
    x = 108,163.75

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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.