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Finding the Fourth Proportional to 103,691.54, 155,378.85 and 69,832.35

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Solution

The fourth proportional to 103,691.54, 155,378.85 and 69,832.35 is: 104,641.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,691.54 : 155,378.85 = 69,832.35 : x
  2. Step 2: Convert to fraction form
    103,691.54/155,378.85 = 69,832.35/x
  3. Step 3: Cross multiply
    103,691.54x = 155,378.85 × 69,832.35
  4. Step 4: Simplify right side
    103,691.54x = 10,850,470,235.80
  5. Step 5: Solve for x
    x = 10,850,470,235.80/103,691.54
  6. Step 6: Final answer
    x = 104,641.81

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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.