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Finding the Fourth Proportional to 68,800.20, 103,103.10 and 47,999.40

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Solution

The fourth proportional to 68,800.20, 103,103.10 and 47,999.40 is: 71,931.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,800.20 : 103,103.10 = 47,999.40 : x
  2. Step 2: Convert to fraction form
    68,800.20/103,103.10 = 47,999.40/x
  3. Step 3: Cross multiply
    68,800.20x = 103,103.10 × 47,999.40
  4. Step 4: Simplify right side
    68,800.20x = 4,948,886,938.14
  5. Step 5: Solve for x
    x = 4,948,886,938.14/68,800.20
  6. Step 6: Final answer
    x = 71,931.29

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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.