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Finding the Fourth Proportional to 128,997.40, 193,437.78 and 45,893.56

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Solution

The fourth proportional to 128,997.40, 193,437.78 and 45,893.56 is: 68,819.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,997.40 : 193,437.78 = 45,893.56 : x
  2. Step 2: Convert to fraction form
    128,997.40/193,437.78 = 45,893.56/x
  3. Step 3: Cross multiply
    128,997.40x = 193,437.78 × 45,893.56
  4. Step 4: Simplify right side
    128,997.40x = 8,877,548,362.70
  5. Step 5: Solve for x
    x = 8,877,548,362.70/128,997.40
  6. Step 6: Final answer
    x = 68,819.59

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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.