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Finding the Fourth Proportional to 56,311.40, 84,467.10 and 55,436.60

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Solution

The fourth proportional to 56,311.40, 84,467.10 and 55,436.60 is: 83,154.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,311.40 : 84,467.10 = 55,436.60 : x
  2. Step 2: Convert to fraction form
    56,311.40/84,467.10 = 55,436.60/x
  3. Step 3: Cross multiply
    56,311.40x = 84,467.10 × 55,436.60
  4. Step 4: Simplify right side
    56,311.40x = 4,682,568,835.86
  5. Step 5: Solve for x
    x = 4,682,568,835.86/56,311.40
  6. Step 6: Final answer
    x = 83,154.90

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1.5x scale

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.