Home / 80,435.13-120,636.86-27,121.92

Finding the Fourth Proportional to 80,435.13, 120,636.86 and 27,121.92

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Solution

The fourth proportional to 80,435.13, 120,636.86 and 27,121.92 is: 40,677.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,435.13 : 120,636.86 = 27,121.92 : x
  2. Step 2: Convert to fraction form
    80,435.13/120,636.86 = 27,121.92/x
  3. Step 3: Cross multiply
    80,435.13x = 120,636.86 × 27,121.92
  4. Step 4: Simplify right side
    80,435.13x = 3,271,903,130.36
  5. Step 5: Solve for x
    x = 3,271,903,130.36/80,435.13
  6. Step 6: Final answer
    x = 40,677.54

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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.