Home / 155,961.90-215,229.60-87,982.02

Finding the Fourth Proportional to 155,961.90, 215,229.60 and 87,982.02

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Solution

The fourth proportional to 155,961.90, 215,229.60 and 87,982.02 is: 121,416.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,961.90 : 215,229.60 = 87,982.02 : x
  2. Step 2: Convert to fraction form
    155,961.90/215,229.60 = 87,982.02/x
  3. Step 3: Cross multiply
    155,961.90x = 215,229.60 × 87,982.02
  4. Step 4: Simplify right side
    155,961.90x = 18,936,334,971.79
  5. Step 5: Solve for x
    x = 18,936,334,971.79/155,961.90
  6. Step 6: Final answer
    x = 121,416.42

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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.