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Finding the Fourth Proportional to 61,739.86, 85,173.20 and 36,247.80

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Solution

The fourth proportional to 61,739.86, 85,173.20 and 36,247.80 is: 50,005.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,739.86 : 85,173.20 = 36,247.80 : x
  2. Step 2: Convert to fraction form
    61,739.86/85,173.20 = 36,247.80/x
  3. Step 3: Cross multiply
    61,739.86x = 85,173.20 × 36,247.80
  4. Step 4: Simplify right side
    61,739.86x = 3,087,341,118.96
  5. Step 5: Solve for x
    x = 3,087,341,118.96/61,739.86
  6. Step 6: Final answer
    x = 50,005.64

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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.