Home / 80,336.89-120,421.72-26,989.28

Finding the Fourth Proportional to 80,336.89, 120,421.72 and 26,989.28

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Solution

The fourth proportional to 80,336.89, 120,421.72 and 26,989.28 is: 40,455.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,336.89 : 120,421.72 = 26,989.28 : x
  2. Step 2: Convert to fraction form
    80,336.89/120,421.72 = 26,989.28/x
  3. Step 3: Cross multiply
    80,336.89x = 120,421.72 × 26,989.28
  4. Step 4: Simplify right side
    80,336.89x = 3,250,095,519.16
  5. Step 5: Solve for x
    x = 3,250,095,519.16/80,336.89
  6. Step 6: Final answer
    x = 40,455.83

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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.