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Finding the Fourth Proportional to 85,958.70, 128,828.70 and 41,489.70

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Solution

The fourth proportional to 85,958.70, 128,828.70 and 41,489.70 is: 62,181.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,958.70 : 128,828.70 = 41,489.70 : x
  2. Step 2: Convert to fraction form
    85,958.70/128,828.70 = 41,489.70/x
  3. Step 3: Cross multiply
    85,958.70x = 128,828.70 × 41,489.70
  4. Step 4: Simplify right side
    85,958.70x = 5,345,064,114.39
  5. Step 5: Solve for x
    x = 5,345,064,114.39/85,958.70
  6. Step 6: Final answer
    x = 62,181.77

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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.