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Finding the Fourth Proportional to 133,781.20, 200,671.80 and 89,429.20

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Solution

The fourth proportional to 133,781.20, 200,671.80 and 89,429.20 is: 134,143.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,781.20 : 200,671.80 = 89,429.20 : x
  2. Step 2: Convert to fraction form
    133,781.20/200,671.80 = 89,429.20/x
  3. Step 3: Cross multiply
    133,781.20x = 200,671.80 × 89,429.20
  4. Step 4: Simplify right side
    133,781.20x = 17,945,918,536.56
  5. Step 5: Solve for x
    x = 17,945,918,536.56/133,781.20
  6. Step 6: Final answer
    x = 134,143.80

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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.