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Finding the Fourth Proportional to 331,813.60, 497,662.80 and 121,343.20

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Solution

The fourth proportional to 331,813.60, 497,662.80 and 121,343.20 is: 181,993.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,813.60 : 497,662.80 = 121,343.20 : x
  2. Step 2: Convert to fraction form
    331,813.60/497,662.80 = 121,343.20/x
  3. Step 3: Cross multiply
    331,813.60x = 497,662.80 × 121,343.20
  4. Step 4: Simplify right side
    331,813.60x = 60,387,996,672.96
  5. Step 5: Solve for x
    x = 60,387,996,672.96/331,813.60
  6. Step 6: Final answer
    x = 181,993.74

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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.