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Finding the Fourth Proportional to 155,855.96, 215,076.92 and 87,872.34

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Solution

The fourth proportional to 155,855.96, 215,076.92 and 87,872.34 is: 121,261.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,855.96 : 215,076.92 = 87,872.34 : x
  2. Step 2: Convert to fraction form
    155,855.96/215,076.92 = 87,872.34/x
  3. Step 3: Cross multiply
    155,855.96x = 215,076.92 × 87,872.34
  4. Step 4: Simplify right side
    155,855.96x = 18,899,311,801.03
  5. Step 5: Solve for x
    x = 18,899,311,801.03/155,855.96
  6. Step 6: Final answer
    x = 121,261.40

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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.