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Finding the Fourth Proportional to 71,979.29, 99,326.90 and 39,714.29

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Solution

The fourth proportional to 71,979.29, 99,326.90 and 39,714.29 is: 54,803.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,979.29 : 99,326.90 = 39,714.29 : x
  2. Step 2: Convert to fraction form
    71,979.29/99,326.90 = 39,714.29/x
  3. Step 3: Cross multiply
    71,979.29x = 99,326.90 × 39,714.29
  4. Step 4: Simplify right side
    71,979.29x = 3,944,696,616.20
  5. Step 5: Solve for x
    x = 3,944,696,616.20/71,979.29
  6. Step 6: Final answer
    x = 54,803.22

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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.