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Finding the Fourth Proportional to 81,662.64, 122,511.42 and 28,356.27

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Solution

The fourth proportional to 81,662.64, 122,511.42 and 28,356.27 is: 42,540.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,662.64 : 122,511.42 = 28,356.27 : x
  2. Step 2: Convert to fraction form
    81,662.64/122,511.42 = 28,356.27/x
  3. Step 3: Cross multiply
    81,662.64x = 122,511.42 × 28,356.27
  4. Step 4: Simplify right side
    81,662.64x = 3,473,966,903.60
  5. Step 5: Solve for x
    x = 3,473,966,903.60/81,662.64
  6. Step 6: Final answer
    x = 42,540.47

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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.