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Finding the Fourth Proportional to 61,874.10, 85,321.72 and 36,718.74

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Solution

The fourth proportional to 61,874.10, 85,321.72 and 36,718.74 is: 50,633.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,874.10 : 85,321.72 = 36,718.74 : x
  2. Step 2: Convert to fraction form
    61,874.10/85,321.72 = 36,718.74/x
  3. Step 3: Cross multiply
    61,874.10x = 85,321.72 × 36,718.74
  4. Step 4: Simplify right side
    61,874.10x = 3,132,905,869.44
  5. Step 5: Solve for x
    x = 3,132,905,869.44/61,874.10
  6. Step 6: Final answer
    x = 50,633.56

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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.