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Finding the Fourth Proportional to 87,808.80, 131,518.80 and 72,256.80

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Solution

The fourth proportional to 87,808.80, 131,518.80 and 72,256.80 is: 108,225.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,808.80 : 131,518.80 = 72,256.80 : x
  2. Step 2: Convert to fraction form
    87,808.80/131,518.80 = 72,256.80/x
  3. Step 3: Cross multiply
    87,808.80x = 131,518.80 × 72,256.80
  4. Step 4: Simplify right side
    87,808.80x = 9,503,127,627.84
  5. Step 5: Solve for x
    x = 9,503,127,627.84/87,808.80
  6. Step 6: Final answer
    x = 108,225.23

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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.