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Finding the Fourth Proportional to 89,674.92, 122,855.18 and 86,311.80

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Solution

The fourth proportional to 89,674.92, 122,855.18 and 86,311.80 is: 118,247.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,674.92 : 122,855.18 = 86,311.80 : x
  2. Step 2: Convert to fraction form
    89,674.92/122,855.18 = 86,311.80/x
  3. Step 3: Cross multiply
    89,674.92x = 122,855.18 × 86,311.80
  4. Step 4: Simplify right side
    89,674.92x = 10,603,851,293.57
  5. Step 5: Solve for x
    x = 10,603,851,293.57/89,674.92
  6. Step 6: Final answer
    x = 118,247.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.