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Finding the Fourth Proportional to 321,118.21, 481,744.95 and 121,434.18

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Solution

The fourth proportional to 321,118.21, 481,744.95 and 121,434.18 is: 182,176.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,118.21 : 481,744.95 = 121,434.18 : x
  2. Step 2: Convert to fraction form
    321,118.21/481,744.95 = 121,434.18/x
  3. Step 3: Cross multiply
    321,118.21x = 481,744.95 × 121,434.18
  4. Step 4: Simplify right side
    321,118.21x = 58,500,302,972.39
  5. Step 5: Solve for x
    x = 58,500,302,972.39/321,118.21
  6. Step 6: Final answer
    x = 182,176.85

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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.