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Finding the Fourth Proportional to 317,753.08, 476,629.20 and 81,095.78

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Solution

The fourth proportional to 317,753.08, 476,629.20 and 81,095.78 is: 121,643.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,753.08 : 476,629.20 = 81,095.78 : x
  2. Step 2: Convert to fraction form
    317,753.08/476,629.20 = 81,095.78/x
  3. Step 3: Cross multiply
    317,753.08x = 476,629.20 × 81,095.78
  4. Step 4: Simplify right side
    317,753.08x = 38,652,616,744.78
  5. Step 5: Solve for x
    x = 38,652,616,744.78/317,753.08
  6. Step 6: Final answer
    x = 121,643.56

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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.