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Finding the Fourth Proportional to 125,792.93, 188,440.32 and 81,450.90

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Solution

The fourth proportional to 125,792.93, 188,440.32 and 81,450.90 is: 122,015.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,792.93 : 188,440.32 = 81,450.90 : x
  2. Step 2: Convert to fraction form
    125,792.93/188,440.32 = 81,450.90/x
  3. Step 3: Cross multiply
    125,792.93x = 188,440.32 × 81,450.90
  4. Step 4: Simplify right side
    125,792.93x = 15,348,633,965.73
  5. Step 5: Solve for x
    x = 15,348,633,965.73/125,792.93
  6. Step 6: Final answer
    x = 122,015.07

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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.