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Finding the Fourth Proportional to 103,408.57, 155,244.10 and 87,924.61

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Solution

The fourth proportional to 103,408.57, 155,244.10 and 87,924.61 is: 131,998.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,408.57 : 155,244.10 = 87,924.61 : x
  2. Step 2: Convert to fraction form
    103,408.57/155,244.10 = 87,924.61/x
  3. Step 3: Cross multiply
    103,408.57x = 155,244.10 × 87,924.61
  4. Step 4: Simplify right side
    103,408.57x = 13,649,776,339.38
  5. Step 5: Solve for x
    x = 13,649,776,339.38/103,408.57
  6. Step 6: Final answer
    x = 131,998.51

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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.