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Finding the Fourth Proportional to 68,635.73, 102,929.48 and 20,590.01

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Solution

The fourth proportional to 68,635.73, 102,929.48 and 20,590.01 is: 30,877.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,635.73 : 102,929.48 = 20,590.01 : x
  2. Step 2: Convert to fraction form
    68,635.73/102,929.48 = 20,590.01/x
  3. Step 3: Cross multiply
    68,635.73x = 102,929.48 × 20,590.01
  4. Step 4: Simplify right side
    68,635.73x = 2,119,319,022.49
  5. Step 5: Solve for x
    x = 2,119,319,022.49/68,635.73
  6. Step 6: Final answer
    x = 30,877.78

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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.