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Finding the Fourth Proportional to 85,110.91, 127,745.21 and 43,020.74

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Solution

The fourth proportional to 85,110.91, 127,745.21 and 43,020.74 is: 64,570.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,110.91 : 127,745.21 = 43,020.74 : x
  2. Step 2: Convert to fraction form
    85,110.91/127,745.21 = 43,020.74/x
  3. Step 3: Cross multiply
    85,110.91x = 127,745.21 × 43,020.74
  4. Step 4: Simplify right side
    85,110.91x = 5,495,693,892.57
  5. Step 5: Solve for x
    x = 5,495,693,892.57/85,110.91
  6. Step 6: Final answer
    x = 64,570.97

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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.