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Finding the Fourth Proportional to 81,370.55, 122,037.60 and 53,486.30

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Solution

The fourth proportional to 81,370.55, 122,037.60 and 53,486.30 is: 80,217.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,370.55 : 122,037.60 = 53,486.30 : x
  2. Step 2: Convert to fraction form
    81,370.55/122,037.60 = 53,486.30/x
  3. Step 3: Cross multiply
    81,370.55x = 122,037.60 × 53,486.30
  4. Step 4: Simplify right side
    81,370.55x = 6,527,339,684.88
  5. Step 5: Solve for x
    x = 6,527,339,684.88/81,370.55
  6. Step 6: Final answer
    x = 80,217.47

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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.