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Finding the Fourth Proportional to 324,069.30, 486,103.95 and 87,435.90

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Solution

The fourth proportional to 324,069.30, 486,103.95 and 87,435.90 is: 131,153.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,069.30 : 486,103.95 = 87,435.90 : x
  2. Step 2: Convert to fraction form
    324,069.30/486,103.95 = 87,435.90/x
  3. Step 3: Cross multiply
    324,069.30x = 486,103.95 × 87,435.90
  4. Step 4: Simplify right side
    324,069.30x = 42,502,936,361.81
  5. Step 5: Solve for x
    x = 42,502,936,361.81/324,069.30
  6. Step 6: Final answer
    x = 131,153.85

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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.