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Finding the Fourth Proportional to 208,313.30, 312,486.15 and 68,086.10

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Solution

The fourth proportional to 208,313.30, 312,486.15 and 68,086.10 is: 102,134.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,313.30 : 312,486.15 = 68,086.10 : x
  2. Step 2: Convert to fraction form
    208,313.30/312,486.15 = 68,086.10/x
  3. Step 3: Cross multiply
    208,313.30x = 312,486.15 × 68,086.10
  4. Step 4: Simplify right side
    208,313.30x = 21,275,961,695.08
  5. Step 5: Solve for x
    x = 21,275,961,695.08/208,313.30
  6. Step 6: Final answer
    x = 102,134.44

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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.