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Finding the Fourth Proportional to 122,387.76, 168,894.72 and 68,673.02

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Solution

The fourth proportional to 122,387.76, 168,894.72 and 68,673.02 is: 94,768.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,387.76 : 168,894.72 = 68,673.02 : x
  2. Step 2: Convert to fraction form
    122,387.76/168,894.72 = 68,673.02/x
  3. Step 3: Cross multiply
    122,387.76x = 168,894.72 × 68,673.02
  4. Step 4: Simplify right side
    122,387.76x = 11,598,509,639.98
  5. Step 5: Solve for x
    x = 11,598,509,639.98/122,387.76
  6. Step 6: Final answer
    x = 94,768.54

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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.