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Finding the Fourth Proportional to 317,739.15, 476,608.50 and 81,081.87

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Solution

The fourth proportional to 317,739.15, 476,608.50 and 81,081.87 is: 121,622.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,739.15 : 476,608.50 = 81,081.87 : x
  2. Step 2: Convert to fraction form
    317,739.15/476,608.50 = 81,081.87/x
  3. Step 3: Cross multiply
    317,739.15x = 476,608.50 × 81,081.87
  4. Step 4: Simplify right side
    317,739.15x = 38,644,308,437.90
  5. Step 5: Solve for x
    x = 38,644,308,437.90/317,739.15
  6. Step 6: Final answer
    x = 121,622.75

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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.