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Finding the Fourth Proportional to 159,321.60, 238,982.40 and 121,996.80

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Solution

The fourth proportional to 159,321.60, 238,982.40 and 121,996.80 is: 182,995.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,321.60 : 238,982.40 = 121,996.80 : x
  2. Step 2: Convert to fraction form
    159,321.60/238,982.40 = 121,996.80/x
  3. Step 3: Cross multiply
    159,321.60x = 238,982.40 × 121,996.80
  4. Step 4: Simplify right side
    159,321.60x = 29,155,088,056.32
  5. Step 5: Solve for x
    x = 29,155,088,056.32/159,321.60
  6. Step 6: Final answer
    x = 182,995.20

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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.