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Finding the Fourth Proportional to 82,403.60, 123,605.40 and 80,945.60

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Solution

The fourth proportional to 82,403.60, 123,605.40 and 80,945.60 is: 121,418.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,403.60 : 123,605.40 = 80,945.60 : x
  2. Step 2: Convert to fraction form
    82,403.60/123,605.40 = 80,945.60/x
  3. Step 3: Cross multiply
    82,403.60x = 123,605.40 × 80,945.60
  4. Step 4: Simplify right side
    82,403.60x = 10,005,313,266.24
  5. Step 5: Solve for x
    x = 10,005,313,266.24/82,403.60
  6. Step 6: Final answer
    x = 121,418.40

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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.