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Finding the Fourth Proportional to 83,728.30, 125,485.44 and 39,256.96

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Solution

The fourth proportional to 83,728.30, 125,485.44 and 39,256.96 is: 58,835.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,728.30 : 125,485.44 = 39,256.96 : x
  2. Step 2: Convert to fraction form
    83,728.30/125,485.44 = 39,256.96/x
  3. Step 3: Cross multiply
    83,728.30x = 125,485.44 × 39,256.96
  4. Step 4: Simplify right side
    83,728.30x = 4,926,176,898.66
  5. Step 5: Solve for x
    x = 4,926,176,898.66/83,728.30
  6. Step 6: Final answer
    x = 58,835.27

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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.