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Finding the Fourth Proportional to 68,446.50, 102,689.19 and 21,700.59

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Solution

The fourth proportional to 68,446.50, 102,689.19 and 21,700.59 is: 32,557.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,446.50 : 102,689.19 = 21,700.59 : x
  2. Step 2: Convert to fraction form
    68,446.50/102,689.19 = 21,700.59/x
  3. Step 3: Cross multiply
    68,446.50x = 102,689.19 × 21,700.59
  4. Step 4: Simplify right side
    68,446.50x = 2,228,416,009.62
  5. Step 5: Solve for x
    x = 2,228,416,009.62/68,446.50
  6. Step 6: Final answer
    x = 32,557.05

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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.