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Finding the Fourth Proportional to 48,893.70, 73,231.20 and 40,145.70

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Solution

The fourth proportional to 48,893.70, 73,231.20 and 40,145.70 is: 60,128.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,893.70 : 73,231.20 = 40,145.70 : x
  2. Step 2: Convert to fraction form
    48,893.70/73,231.20 = 40,145.70/x
  3. Step 3: Cross multiply
    48,893.70x = 73,231.20 × 40,145.70
  4. Step 4: Simplify right side
    48,893.70x = 2,939,917,785.84
  5. Step 5: Solve for x
    x = 2,939,917,785.84/48,893.70
  6. Step 6: Final answer
    x = 60,128.76

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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.