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Finding the Fourth Proportional to 170,687.30, 256,056.30 and 55,243.16

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Solution

The fourth proportional to 170,687.30, 256,056.30 and 55,243.16 is: 82,872.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,687.30 : 256,056.30 = 55,243.16 : x
  2. Step 2: Convert to fraction form
    170,687.30/256,056.30 = 55,243.16/x
  3. Step 3: Cross multiply
    170,687.30x = 256,056.30 × 55,243.16
  4. Step 4: Simplify right side
    170,687.30x = 14,145,357,869.63
  5. Step 5: Solve for x
    x = 14,145,357,869.63/170,687.30
  6. Step 6: Final answer
    x = 82,872.94

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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.