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Finding the Fourth Proportional to 317,418.48, 476,130.56 and 80,760.92

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Solution

The fourth proportional to 317,418.48, 476,130.56 and 80,760.92 is: 121,142.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,418.48 : 476,130.56 = 80,760.92 : x
  2. Step 2: Convert to fraction form
    317,418.48/476,130.56 = 80,760.92/x
  3. Step 3: Cross multiply
    317,418.48x = 476,130.56 × 80,760.92
  4. Step 4: Simplify right side
    317,418.48x = 38,452,739,281.26
  5. Step 5: Solve for x
    x = 38,452,739,281.26/317,418.48
  6. Step 6: Final answer
    x = 121,142.09

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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.