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Finding the Fourth Proportional to 243,080.20, 364,620.30 and 85,324.60

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Solution

The fourth proportional to 243,080.20, 364,620.30 and 85,324.60 is: 127,986.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,080.20 : 364,620.30 = 85,324.60 : x
  2. Step 2: Convert to fraction form
    243,080.20/364,620.30 = 85,324.60/x
  3. Step 3: Cross multiply
    243,080.20x = 364,620.30 × 85,324.60
  4. Step 4: Simplify right side
    243,080.20x = 31,111,081,249.38
  5. Step 5: Solve for x
    x = 31,111,081,249.38/243,080.20
  6. Step 6: Final answer
    x = 127,986.90

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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.