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Finding the Fourth Proportional to 125,989.67, 188,922.99 and 54,972.32

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Solution

The fourth proportional to 125,989.67, 188,922.99 and 54,972.32 is: 82,431.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,989.67 : 188,922.99 = 54,972.32 : x
  2. Step 2: Convert to fraction form
    125,989.67/188,922.99 = 54,972.32/x
  3. Step 3: Cross multiply
    125,989.67x = 188,922.99 × 54,972.32
  4. Step 4: Simplify right side
    125,989.67x = 10,385,535,061.64
  5. Step 5: Solve for x
    x = 10,385,535,061.64/125,989.67
  6. Step 6: Final answer
    x = 82,431.64

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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.