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Finding the Fourth Proportional to 68,144.52, 102,220.89 and 21,397.40

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Solution

The fourth proportional to 68,144.52, 102,220.89 and 21,397.40 is: 32,097.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,144.52 : 102,220.89 = 21,397.40 : x
  2. Step 2: Convert to fraction form
    68,144.52/102,220.89 = 21,397.40/x
  3. Step 3: Cross multiply
    68,144.52x = 102,220.89 × 21,397.40
  4. Step 4: Simplify right side
    68,144.52x = 2,187,261,063.67
  5. Step 5: Solve for x
    x = 2,187,261,063.67/68,144.52
  6. Step 6: Final answer
    x = 32,097.39

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1.5x scale

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.