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Finding the Fourth Proportional to 80,999.36, 111,784.08 and 45,189.44

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Solution

The fourth proportional to 80,999.36, 111,784.08 and 45,189.44 is: 62,364.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,999.36 : 111,784.08 = 45,189.44 : x
  2. Step 2: Convert to fraction form
    80,999.36/111,784.08 = 45,189.44/x
  3. Step 3: Cross multiply
    80,999.36x = 111,784.08 × 45,189.44
  4. Step 4: Simplify right side
    80,999.36x = 5,051,459,976.12
  5. Step 5: Solve for x
    x = 5,051,459,976.12/80,999.36
  6. Step 6: Final answer
    x = 62,364.20

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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.