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Finding the Fourth Proportional to 68,479.20, 102,710.70 and 18,556.20

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Solution

The fourth proportional to 68,479.20, 102,710.70 and 18,556.20 is: 27,832.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,479.20 : 102,710.70 = 18,556.20 : x
  2. Step 2: Convert to fraction form
    68,479.20/102,710.70 = 18,556.20/x
  3. Step 3: Cross multiply
    68,479.20x = 102,710.70 × 18,556.20
  4. Step 4: Simplify right side
    68,479.20x = 1,905,920,291.34
  5. Step 5: Solve for x
    x = 1,905,920,291.34/68,479.20
  6. Step 6: Final answer
    x = 27,832.11

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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.