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Finding the Fourth Proportional to 86,305.82, 129,479.09 and 27,141.48

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Solution

The fourth proportional to 86,305.82, 129,479.09 and 27,141.48 is: 40,718.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,305.82 : 129,479.09 = 27,141.48 : x
  2. Step 2: Convert to fraction form
    86,305.82/129,479.09 = 27,141.48/x
  3. Step 3: Cross multiply
    86,305.82x = 129,479.09 × 27,141.48
  4. Step 4: Simplify right side
    86,305.82x = 3,514,253,995.95
  5. Step 5: Solve for x
    x = 3,514,253,995.95/86,305.82
  6. Step 6: Final answer
    x = 40,718.62

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1.5x scale

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.