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Finding the Fourth Proportional to 206,979.50, 310,588.86 and 87,026.88

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Solution

The fourth proportional to 206,979.50, 310,588.86 and 87,026.88 is: 130,590.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,979.50 : 310,588.86 = 87,026.88 : x
  2. Step 2: Convert to fraction form
    206,979.50/310,588.86 = 87,026.88/x
  3. Step 3: Cross multiply
    206,979.50x = 310,588.86 × 87,026.88
  4. Step 4: Simplify right side
    206,979.50x = 27,029,579,331.80
  5. Step 5: Solve for x
    x = 27,029,579,331.80/206,979.50
  6. Step 6: Final answer
    x = 130,590.61

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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.