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Finding the Fourth Proportional to 78,999.91, 109,027.32 and 43,195.28

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Solution

The fourth proportional to 78,999.91, 109,027.32 and 43,195.28 is: 59,613.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,999.91 : 109,027.32 = 43,195.28 : x
  2. Step 2: Convert to fraction form
    78,999.91/109,027.32 = 43,195.28/x
  3. Step 3: Cross multiply
    78,999.91x = 109,027.32 × 43,195.28
  4. Step 4: Simplify right side
    78,999.91x = 4,709,464,907.93
  5. Step 5: Solve for x
    x = 4,709,464,907.93/78,999.91
  6. Step 6: Final answer
    x = 59,613.55

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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.