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Finding the Fourth Proportional to 61,939.72, 85,449.18 and 36,774.64

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Solution

The fourth proportional to 61,939.72, 85,449.18 and 36,774.64 is: 50,732.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,939.72 : 85,449.18 = 36,774.64 : x
  2. Step 2: Convert to fraction form
    61,939.72/85,449.18 = 36,774.64/x
  3. Step 3: Cross multiply
    61,939.72x = 85,449.18 × 36,774.64
  4. Step 4: Simplify right side
    61,939.72x = 3,142,362,832.80
  5. Step 5: Solve for x
    x = 3,142,362,832.80/61,939.72
  6. Step 6: Final answer
    x = 50,732.60

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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.