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Finding the Fourth Proportional to 115,906.70, 173,860.05 and 87,913.10

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Solution

The fourth proportional to 115,906.70, 173,860.05 and 87,913.10 is: 131,869.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,906.70 : 173,860.05 = 87,913.10 : x
  2. Step 2: Convert to fraction form
    115,906.70/173,860.05 = 87,913.10/x
  3. Step 3: Cross multiply
    115,906.70x = 173,860.05 × 87,913.10
  4. Step 4: Simplify right side
    115,906.70x = 15,284,575,961.66
  5. Step 5: Solve for x
    x = 15,284,575,961.66/115,906.70
  6. Step 6: Final answer
    x = 131,869.65

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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.