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Finding the Fourth Proportional to 105,718.92, 158,247.90 and 68,228.88

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Solution

The fourth proportional to 105,718.92, 158,247.90 and 68,228.88 is: 102,130.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,718.92 : 158,247.90 = 68,228.88 : x
  2. Step 2: Convert to fraction form
    105,718.92/158,247.90 = 68,228.88/x
  3. Step 3: Cross multiply
    105,718.92x = 158,247.90 × 68,228.88
  4. Step 4: Simplify right side
    105,718.92x = 10,797,076,979.35
  5. Step 5: Solve for x
    x = 10,797,076,979.35/105,718.92
  6. Step 6: Final answer
    x = 102,130.03

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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.