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Finding the Fourth Proportional to 158,310.92, 218,469.35 and 85,714.54

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Solution

The fourth proportional to 158,310.92, 218,469.35 and 85,714.54 is: 118,286.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,310.92 : 218,469.35 = 85,714.54 : x
  2. Step 2: Convert to fraction form
    158,310.92/218,469.35 = 85,714.54/x
  3. Step 3: Cross multiply
    158,310.92x = 218,469.35 × 85,714.54
  4. Step 4: Simplify right side
    158,310.92x = 18,725,999,507.46
  5. Step 5: Solve for x
    x = 18,725,999,507.46/158,310.92
  6. Step 6: Final answer
    x = 118,286.21

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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.