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Finding the Fourth Proportional to 124,628.06, 171,978.72 and 68,039.30

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Solution

The fourth proportional to 124,628.06, 171,978.72 and 68,039.30 is: 93,889.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,628.06 : 171,978.72 = 68,039.30 : x
  2. Step 2: Convert to fraction form
    124,628.06/171,978.72 = 68,039.30/x
  3. Step 3: Cross multiply
    124,628.06x = 171,978.72 × 68,039.30
  4. Step 4: Simplify right side
    124,628.06x = 11,701,311,723.70
  5. Step 5: Solve for x
    x = 11,701,311,723.70/124,628.06
  6. Step 6: Final answer
    x = 93,889.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.