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Finding the Fourth Proportional to 324,361.20, 486,540.60 and 87,703.86

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Solution

The fourth proportional to 324,361.20, 486,540.60 and 87,703.86 is: 131,555.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,361.20 : 486,540.60 = 87,703.86 : x
  2. Step 2: Convert to fraction form
    324,361.20/486,540.60 = 87,703.86/x
  3. Step 3: Cross multiply
    324,361.20x = 486,540.60 × 87,703.86
  4. Step 4: Simplify right side
    324,361.20x = 42,671,488,666.72
  5. Step 5: Solve for x
    x = 42,671,488,666.72/324,361.20
  6. Step 6: Final answer
    x = 131,555.47

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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.