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Finding the Fourth Proportional to 82,503.60, 123,755.40 and 72,662.10

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Solution

The fourth proportional to 82,503.60, 123,755.40 and 72,662.10 is: 108,993.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,503.60 : 123,755.40 = 72,662.10 : x
  2. Step 2: Convert to fraction form
    82,503.60/123,755.40 = 72,662.10/x
  3. Step 3: Cross multiply
    82,503.60x = 123,755.40 × 72,662.10
  4. Step 4: Simplify right side
    82,503.60x = 8,992,327,250.34
  5. Step 5: Solve for x
    x = 8,992,327,250.34/82,503.60
  6. Step 6: Final answer
    x = 108,993.15

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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.