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Finding the Fourth Proportional to 124,628.52, 171,986.46 and 68,039.90

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Solution

The fourth proportional to 124,628.52, 171,986.46 and 68,039.90 is: 93,894.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,628.52 : 171,986.46 = 68,039.90 : x
  2. Step 2: Convert to fraction form
    124,628.52/171,986.46 = 68,039.90/x
  3. Step 3: Cross multiply
    124,628.52x = 171,986.46 × 68,039.90
  4. Step 4: Simplify right side
    124,628.52x = 11,701,941,069.62
  5. Step 5: Solve for x
    x = 11,701,941,069.62/124,628.52
  6. Step 6: Final answer
    x = 93,894.57

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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.