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Finding the Fourth Proportional to 178,963.94, 268,640.42 and 72,421.23

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Solution

The fourth proportional to 178,963.94, 268,640.42 and 72,421.23 is: 108,710.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,963.94 : 268,640.42 = 72,421.23 : x
  2. Step 2: Convert to fraction form
    178,963.94/268,640.42 = 72,421.23/x
  3. Step 3: Cross multiply
    178,963.94x = 268,640.42 × 72,421.23
  4. Step 4: Simplify right side
    178,963.94x = 19,455,269,644.12
  5. Step 5: Solve for x
    x = 19,455,269,644.12/178,963.94
  6. Step 6: Final answer
    x = 108,710.56

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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.