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Finding the Fourth Proportional to 125,932.55, 188,898.60 and 86,369.72

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Solution

The fourth proportional to 125,932.55, 188,898.60 and 86,369.72 is: 129,554.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,932.55 : 188,898.60 = 86,369.72 : x
  2. Step 2: Convert to fraction form
    125,932.55/188,898.60 = 86,369.72/x
  3. Step 3: Cross multiply
    125,932.55x = 188,898.60 × 86,369.72
  4. Step 4: Simplify right side
    125,932.55x = 16,315,118,245.90
  5. Step 5: Solve for x
    x = 16,315,118,245.90/125,932.55
  6. Step 6: Final answer
    x = 129,554.42

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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.