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Finding the Fourth Proportional to 68,008.17, 102,018.33 and 21,259.83

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Solution

The fourth proportional to 68,008.17, 102,018.33 and 21,259.83 is: 31,891.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,008.17 : 102,018.33 = 21,259.83 : x
  2. Step 2: Convert to fraction form
    68,008.17/102,018.33 = 21,259.83/x
  3. Step 3: Cross multiply
    68,008.17x = 102,018.33 × 21,259.83
  4. Step 4: Simplify right side
    68,008.17x = 2,168,892,352.68
  5. Step 5: Solve for x
    x = 2,168,892,352.68/68,008.17
  6. Step 6: Final answer
    x = 31,891.64

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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.