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Finding the Fourth Proportional to 81,636.37, 112,650.45 and 45,819.40

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Solution

The fourth proportional to 81,636.37, 112,650.45 and 45,819.40 is: 63,226.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,636.37 : 112,650.45 = 45,819.40 : x
  2. Step 2: Convert to fraction form
    81,636.37/112,650.45 = 45,819.40/x
  3. Step 3: Cross multiply
    81,636.37x = 112,650.45 × 45,819.40
  4. Step 4: Simplify right side
    81,636.37x = 5,161,576,028.73
  5. Step 5: Solve for x
    x = 5,161,576,028.73/81,636.37
  6. Step 6: Final answer
    x = 63,226.43

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1.5x scale

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.