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Finding the Fourth Proportional to 172,273.60, 257,900.10 and 128,096.20

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Solution

The fourth proportional to 172,273.60, 257,900.10 and 128,096.20 is: 191,764.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,273.60 : 257,900.10 = 128,096.20 : x
  2. Step 2: Convert to fraction form
    172,273.60/257,900.10 = 128,096.20/x
  3. Step 3: Cross multiply
    172,273.60x = 257,900.10 × 128,096.20
  4. Step 4: Simplify right side
    172,273.60x = 33,036,022,789.62
  5. Step 5: Solve for x
    x = 33,036,022,789.62/172,273.60
  6. Step 6: Final answer
    x = 191,764.86

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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.