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Finding the Fourth Proportional to 68,890.62, 103,337.13 and 18,970.46

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Solution

The fourth proportional to 68,890.62, 103,337.13 and 18,970.46 is: 28,456.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,890.62 : 103,337.13 = 18,970.46 : x
  2. Step 2: Convert to fraction form
    68,890.62/103,337.13 = 18,970.46/x
  3. Step 3: Cross multiply
    68,890.62x = 103,337.13 × 18,970.46
  4. Step 4: Simplify right side
    68,890.62x = 1,960,352,891.18
  5. Step 5: Solve for x
    x = 1,960,352,891.18/68,890.62
  6. Step 6: Final answer
    x = 28,456.02

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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.