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Finding the Fourth Proportional to 131,243.60, 196,735.80 and 64,629.20

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Solution

The fourth proportional to 131,243.60, 196,735.80 and 64,629.20 is: 96,879.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,243.60 : 196,735.80 = 64,629.20 : x
  2. Step 2: Convert to fraction form
    131,243.60/196,735.80 = 64,629.20/x
  3. Step 3: Cross multiply
    131,243.60x = 196,735.80 × 64,629.20
  4. Step 4: Simplify right side
    131,243.60x = 12,714,877,365.36
  5. Step 5: Solve for x
    x = 12,714,877,365.36/131,243.60
  6. Step 6: Final answer
    x = 96,879.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.