Home / 90,011.70-134,890.77-68,869.89

Finding the Fourth Proportional to 90,011.70, 134,890.77 and 68,869.89

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Solution

The fourth proportional to 90,011.70, 134,890.77 and 68,869.89 is: 103,207.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,011.70 : 134,890.77 = 68,869.89 : x
  2. Step 2: Convert to fraction form
    90,011.70/134,890.77 = 68,869.89/x
  3. Step 3: Cross multiply
    90,011.70x = 134,890.77 × 68,869.89
  4. Step 4: Simplify right side
    90,011.70x = 9,289,912,491.92
  5. Step 5: Solve for x
    x = 9,289,912,491.92/90,011.70
  6. Step 6: Final answer
    x = 103,207.83

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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.