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Finding the Fourth Proportional to 72,979.58, 100,714.66 and 41,147.80

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Solution

The fourth proportional to 72,979.58, 100,714.66 and 41,147.80 is: 56,785.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,979.58 : 100,714.66 = 41,147.80 : x
  2. Step 2: Convert to fraction form
    72,979.58/100,714.66 = 41,147.80/x
  3. Step 3: Cross multiply
    72,979.58x = 100,714.66 × 41,147.80
  4. Step 4: Simplify right side
    72,979.58x = 4,144,186,332.09
  5. Step 5: Solve for x
    x = 4,144,186,332.09/72,979.58
  6. Step 6: Final answer
    x = 56,785.56

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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.