Home / 91,289.62-126,014.83-81,712.61

Finding the Fourth Proportional to 91,289.62, 126,014.83 and 81,712.61

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Solution

The fourth proportional to 91,289.62, 126,014.83 and 81,712.61 is: 112,794.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,289.62 : 126,014.83 = 81,712.61 : x
  2. Step 2: Convert to fraction form
    91,289.62/126,014.83 = 81,712.61/x
  3. Step 3: Cross multiply
    91,289.62x = 126,014.83 × 81,712.61
  4. Step 4: Simplify right side
    91,289.62x = 10,297,000,890.39
  5. Step 5: Solve for x
    x = 10,297,000,890.39/91,289.62
  6. Step 6: Final answer
    x = 112,794.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.