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Finding the Fourth Proportional to 206,618.15, 310,046.88 and 86,664.44

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Solution

The fourth proportional to 206,618.15, 310,046.88 and 86,664.44 is: 130,046.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,618.15 : 310,046.88 = 86,664.44 : x
  2. Step 2: Convert to fraction form
    206,618.15/310,046.88 = 86,664.44/x
  3. Step 3: Cross multiply
    206,618.15x = 310,046.88 × 86,664.44
  4. Step 4: Simplify right side
    206,618.15x = 26,870,037,678.71
  5. Step 5: Solve for x
    x = 26,870,037,678.71/206,618.15
  6. Step 6: Final answer
    x = 130,046.84

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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.