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Finding the Fourth Proportional to 68,042.80, 102,063.48 and 21,296.08

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Solution

The fourth proportional to 68,042.80, 102,063.48 and 21,296.08 is: 31,943.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,042.80 : 102,063.48 = 21,296.08 : x
  2. Step 2: Convert to fraction form
    68,042.80/102,063.48 = 21,296.08/x
  3. Step 3: Cross multiply
    68,042.80x = 102,063.48 × 21,296.08
  4. Step 4: Simplify right side
    68,042.80x = 2,173,552,035.16
  5. Step 5: Solve for x
    x = 2,173,552,035.16/68,042.80
  6. Step 6: Final answer
    x = 31,943.89

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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.