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Finding the Fourth Proportional to 61,586.78, 85,012.87 and 40,367.41

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Solution

The fourth proportional to 61,586.78, 85,012.87 and 40,367.41 is: 55,722.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,586.78 : 85,012.87 = 40,367.41 : x
  2. Step 2: Convert to fraction form
    61,586.78/85,012.87 = 40,367.41/x
  3. Step 3: Cross multiply
    61,586.78x = 85,012.87 × 40,367.41
  4. Step 4: Simplify right side
    61,586.78x = 3,431,749,505.47
  5. Step 5: Solve for x
    x = 3,431,749,505.47/61,586.78
  6. Step 6: Final answer
    x = 55,722.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.