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Finding the Fourth Proportional to 125,989.25, 188,984.27 and 86,426.42

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Solution

The fourth proportional to 125,989.25, 188,984.27 and 86,426.42 is: 129,639.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,989.25 : 188,984.27 = 86,426.42 : x
  2. Step 2: Convert to fraction form
    125,989.25/188,984.27 = 86,426.42/x
  3. Step 3: Cross multiply
    125,989.25x = 188,984.27 × 86,426.42
  4. Step 4: Simplify right side
    125,989.25x = 16,333,233,163.56
  5. Step 5: Solve for x
    x = 16,333,233,163.56/125,989.25
  6. Step 6: Final answer
    x = 129,639.90

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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.