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Finding the Fourth Proportional to 204,372.15, 306,245.93 and 85,978.59

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Solution

The fourth proportional to 204,372.15, 306,245.93 and 85,978.59 is: 128,836.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,372.15 : 306,245.93 = 85,978.59 : x
  2. Step 2: Convert to fraction form
    204,372.15/306,245.93 = 85,978.59/x
  3. Step 3: Cross multiply
    204,372.15x = 306,245.93 × 85,978.59
  4. Step 4: Simplify right side
    204,372.15x = 26,330,592,824.75
  5. Step 5: Solve for x
    x = 26,330,592,824.75/204,372.15
  6. Step 6: Final answer
    x = 128,836.50

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1.5x scale

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.