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Finding the Fourth Proportional to 68,957.43, 103,362.58 and 39,311.43

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Solution

The fourth proportional to 68,957.43, 103,362.58 and 39,311.43 is: 58,925.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,957.43 : 103,362.58 = 39,311.43 : x
  2. Step 2: Convert to fraction form
    68,957.43/103,362.58 = 39,311.43/x
  3. Step 3: Cross multiply
    68,957.43x = 103,362.58 × 39,311.43
  4. Step 4: Simplify right side
    68,957.43x = 4,063,330,489.82
  5. Step 5: Solve for x
    x = 4,063,330,489.82/68,957.43
  6. Step 6: Final answer
    x = 58,925.21

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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.