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Finding the Fourth Proportional to 68,595.39, 102,899.84 and 21,208.64

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Solution

The fourth proportional to 68,595.39, 102,899.84 and 21,208.64 is: 31,815.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,595.39 : 102,899.84 = 21,208.64 : x
  2. Step 2: Convert to fraction form
    68,595.39/102,899.84 = 21,208.64/x
  3. Step 3: Cross multiply
    68,595.39x = 102,899.84 × 21,208.64
  4. Step 4: Simplify right side
    68,595.39x = 2,182,365,042.08
  5. Step 5: Solve for x
    x = 2,182,365,042.08/68,595.39
  6. Step 6: Final answer
    x = 31,815.04

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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.