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Finding the Fourth Proportional to 71,979.09, 99,326.64 and 39,714.09

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Solution

The fourth proportional to 71,979.09, 99,326.64 and 39,714.09 is: 54,802.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,979.09 : 99,326.64 = 39,714.09 : x
  2. Step 2: Convert to fraction form
    71,979.09/99,326.64 = 39,714.09/x
  3. Step 3: Cross multiply
    71,979.09x = 99,326.64 × 39,714.09
  4. Step 4: Simplify right side
    71,979.09x = 3,944,667,120.36
  5. Step 5: Solve for x
    x = 3,944,667,120.36/71,979.09
  6. Step 6: Final answer
    x = 54,802.96

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1.5x scale

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.