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Finding the Fourth Proportional to 309,390.80, 464,086.60 and 84,753.21

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Solution

The fourth proportional to 309,390.80, 464,086.60 and 84,753.21 is: 127,129.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,390.80 : 464,086.60 = 84,753.21 : x
  2. Step 2: Convert to fraction form
    309,390.80/464,086.60 = 84,753.21/x
  3. Step 3: Cross multiply
    309,390.80x = 464,086.60 × 84,753.21
  4. Step 4: Simplify right side
    309,390.80x = 39,332,829,067.99
  5. Step 5: Solve for x
    x = 39,332,829,067.99/309,390.80
  6. Step 6: Final answer
    x = 127,129.92

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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.