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Finding the Fourth Proportional to 308,130.30, 462,195.45 and 86,514.30

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Solution

The fourth proportional to 308,130.30, 462,195.45 and 86,514.30 is: 129,771.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,130.30 : 462,195.45 = 86,514.30 : x
  2. Step 2: Convert to fraction form
    308,130.30/462,195.45 = 86,514.30/x
  3. Step 3: Cross multiply
    308,130.30x = 462,195.45 × 86,514.30
  4. Step 4: Simplify right side
    308,130.30x = 39,986,515,819.94
  5. Step 5: Solve for x
    x = 39,986,515,819.94/308,130.30
  6. Step 6: Final answer
    x = 129,771.45

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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.