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Finding the Fourth Proportional to 194,489.60, 291,273.60 and 131,820.80

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Solution

The fourth proportional to 194,489.60, 291,273.60 and 131,820.80 is: 197,418.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    194,489.60 : 291,273.60 = 131,820.80 : x
  2. Step 2: Convert to fraction form
    194,489.60/291,273.60 = 131,820.80/x
  3. Step 3: Cross multiply
    194,489.60x = 291,273.60 × 131,820.80
  4. Step 4: Simplify right side
    194,489.60x = 38,395,918,970.88
  5. Step 5: Solve for x
    x = 38,395,918,970.88/194,489.60
  6. Step 6: Final answer
    x = 197,418.88

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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.