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Finding the Fourth Proportional to 230,918.40, 346,291.20 and 81,100.80

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Solution

The fourth proportional to 230,918.40, 346,291.20 and 81,100.80 is: 121,620.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,918.40 : 346,291.20 = 81,100.80 : x
  2. Step 2: Convert to fraction form
    230,918.40/346,291.20 = 81,100.80/x
  3. Step 3: Cross multiply
    230,918.40x = 346,291.20 × 81,100.80
  4. Step 4: Simplify right side
    230,918.40x = 28,084,493,352.96
  5. Step 5: Solve for x
    x = 28,084,493,352.96/230,918.40
  6. Step 6: Final answer
    x = 121,620.86

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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.