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Finding the Fourth Proportional to 125,902.78, 188,703.95 and 87,745.43

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Solution

The fourth proportional to 125,902.78, 188,703.95 and 87,745.43 is: 131,513.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,902.78 : 188,703.95 = 87,745.43 : x
  2. Step 2: Convert to fraction form
    125,902.78/188,703.95 = 87,745.43/x
  3. Step 3: Cross multiply
    125,902.78x = 188,703.95 × 87,745.43
  4. Step 4: Simplify right side
    125,902.78x = 16,557,908,947.37
  5. Step 5: Solve for x
    x = 16,557,908,947.37/125,902.78
  6. Step 6: Final answer
    x = 131,513.45

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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.