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Finding the Fourth Proportional to 122,420.76, 168,957.60 and 68,709

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Solution

The fourth proportional to 122,420.76, 168,957.60 and 68,709 is: 94,827.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,420.76 : 168,957.60 = 68,709 : x
  2. Step 2: Convert to fraction form
    122,420.76/168,957.60 = 68,709/x
  3. Step 3: Cross multiply
    122,420.76x = 168,957.60 × 68,709
  4. Step 4: Simplify right side
    122,420.76x = 11,608,907,738.40
  5. Step 5: Solve for x
    x = 11,608,907,738.40/122,420.76
  6. Step 6: Final answer
    x = 94,827.93

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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.