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Finding the Fourth Proportional to 125,590.78, 188,450.82 and 69,420.46

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Solution

The fourth proportional to 125,590.78, 188,450.82 and 69,420.46 is: 104,166.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,590.78 : 188,450.82 = 69,420.46 : x
  2. Step 2: Convert to fraction form
    125,590.78/188,450.82 = 69,420.46/x
  3. Step 3: Cross multiply
    125,590.78x = 188,450.82 × 69,420.46
  4. Step 4: Simplify right side
    125,590.78x = 13,082,342,611.78
  5. Step 5: Solve for x
    x = 13,082,342,611.78/125,590.78
  6. Step 6: Final answer
    x = 104,166.43

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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.