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Finding the Fourth Proportional to 61,221.40, 91,832.10 and 43,336.60

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Solution

The fourth proportional to 61,221.40, 91,832.10 and 43,336.60 is: 65,004.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,221.40 : 91,832.10 = 43,336.60 : x
  2. Step 2: Convert to fraction form
    61,221.40/91,832.10 = 43,336.60/x
  3. Step 3: Cross multiply
    61,221.40x = 91,832.10 × 43,336.60
  4. Step 4: Simplify right side
    61,221.40x = 3,979,690,984.86
  5. Step 5: Solve for x
    x = 3,979,690,984.86/61,221.40
  6. Step 6: Final answer
    x = 65,004.90

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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.