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Finding the Fourth Proportional to 317,958.60, 476,942.70 and 81,296.04

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Solution

The fourth proportional to 317,958.60, 476,942.70 and 81,296.04 is: 121,945.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,958.60 : 476,942.70 = 81,296.04 : x
  2. Step 2: Convert to fraction form
    317,958.60/476,942.70 = 81,296.04/x
  3. Step 3: Cross multiply
    317,958.60x = 476,942.70 × 81,296.04
  4. Step 4: Simplify right side
    317,958.60x = 38,773,552,816.91
  5. Step 5: Solve for x
    x = 38,773,552,816.91/317,958.60
  6. Step 6: Final answer
    x = 121,945.29

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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.