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Finding the Fourth Proportional to 122,399.76, 168,897.96 and 68,673.60

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Solution

The fourth proportional to 122,399.76, 168,897.96 and 68,673.60 is: 94,761.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,399.76 : 168,897.96 = 68,673.60 : x
  2. Step 2: Convert to fraction form
    122,399.76/168,897.96 = 68,673.60/x
  3. Step 3: Cross multiply
    122,399.76x = 168,897.96 × 68,673.60
  4. Step 4: Simplify right side
    122,399.76x = 11,598,830,945.86
  5. Step 5: Solve for x
    x = 11,598,830,945.86/122,399.76
  6. Step 6: Final answer
    x = 94,761.88

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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.