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Finding the Fourth Proportional to 103,676.60, 155,514.90 and 68,041.40

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Solution

The fourth proportional to 103,676.60, 155,514.90 and 68,041.40 is: 102,062.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,676.60 : 155,514.90 = 68,041.40 : x
  2. Step 2: Convert to fraction form
    103,676.60/155,514.90 = 68,041.40/x
  3. Step 3: Cross multiply
    103,676.60x = 155,514.90 × 68,041.40
  4. Step 4: Simplify right side
    103,676.60x = 10,581,451,516.86
  5. Step 5: Solve for x
    x = 10,581,451,516.86/103,676.60
  6. Step 6: Final answer
    x = 102,062.10

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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.