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Finding the Fourth Proportional to 85,872.62, 118,479.96 and 55,659.21

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Solution

The fourth proportional to 85,872.62, 118,479.96 and 55,659.21 is: 76,793.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,872.62 : 118,479.96 = 55,659.21 : x
  2. Step 2: Convert to fraction form
    85,872.62/118,479.96 = 55,659.21/x
  3. Step 3: Cross multiply
    85,872.62x = 118,479.96 × 55,659.21
  4. Step 4: Simplify right side
    85,872.62x = 6,594,500,974.43
  5. Step 5: Solve for x
    x = 6,594,500,974.43/85,872.62
  6. Step 6: Final answer
    x = 76,793.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.