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Finding the Fourth Proportional to 57,081.70, 85,573.86 and 40,389.22

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Solution

The fourth proportional to 57,081.70, 85,573.86 and 40,389.22 is: 60,549.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,081.70 : 85,573.86 = 40,389.22 : x
  2. Step 2: Convert to fraction form
    57,081.70/85,573.86 = 40,389.22/x
  3. Step 3: Cross multiply
    57,081.70x = 85,573.86 × 40,389.22
  4. Step 4: Simplify right side
    57,081.70x = 3,456,261,457.79
  5. Step 5: Solve for x
    x = 3,456,261,457.79/57,081.70
  6. Step 6: Final answer
    x = 60,549.38

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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.