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Finding the Fourth Proportional to 125,938.76, 188,907.90 and 86,375.93

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Solution

The fourth proportional to 125,938.76, 188,907.90 and 86,375.93 is: 129,563.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,938.76 : 188,907.90 = 86,375.93 : x
  2. Step 2: Convert to fraction form
    125,938.76/188,907.90 = 86,375.93/x
  3. Step 3: Cross multiply
    125,938.76x = 188,907.90 × 86,375.93
  4. Step 4: Simplify right side
    125,938.76x = 16,317,095,546.85
  5. Step 5: Solve for x
    x = 16,317,095,546.85/125,938.76
  6. Step 6: Final answer
    x = 129,563.73

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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.