Home / 87,961.80-131,748.30-72,409.80

Finding the Fourth Proportional to 87,961.80, 131,748.30 and 72,409.80

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Solution

The fourth proportional to 87,961.80, 131,748.30 and 72,409.80 is: 108,454.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,961.80 : 131,748.30 = 72,409.80 : x
  2. Step 2: Convert to fraction form
    87,961.80/131,748.30 = 72,409.80/x
  3. Step 3: Cross multiply
    87,961.80x = 131,748.30 × 72,409.80
  4. Step 4: Simplify right side
    87,961.80x = 9,539,868,053.34
  5. Step 5: Solve for x
    x = 9,539,868,053.34/87,961.80
  6. Step 6: Final answer
    x = 108,454.67

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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.