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Finding the Fourth Proportional to 85,010.81, 127,543.88 and 40,641.03

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Solution

The fourth proportional to 85,010.81, 127,543.88 and 40,641.03 is: 60,974.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,010.81 : 127,543.88 = 40,641.03 : x
  2. Step 2: Convert to fraction form
    85,010.81/127,543.88 = 40,641.03/x
  3. Step 3: Cross multiply
    85,010.81x = 127,543.88 × 40,641.03
  4. Step 4: Simplify right side
    85,010.81x = 5,183,514,755.00
  5. Step 5: Solve for x
    x = 5,183,514,755.00/85,010.81
  6. Step 6: Final answer
    x = 60,974.78

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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.