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Finding the Fourth Proportional to 72,046.80, 107,924.40 and 40,845.60

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Solution

The fourth proportional to 72,046.80, 107,924.40 and 40,845.60 is: 61,185.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,046.80 : 107,924.40 = 40,845.60 : x
  2. Step 2: Convert to fraction form
    72,046.80/107,924.40 = 40,845.60/x
  3. Step 3: Cross multiply
    72,046.80x = 107,924.40 × 40,845.60
  4. Step 4: Simplify right side
    72,046.80x = 4,408,236,872.64
  5. Step 5: Solve for x
    x = 4,408,236,872.64/72,046.80
  6. Step 6: Final answer
    x = 61,185.74

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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.