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Finding the Fourth Proportional to 133,941.60, 200,620.80 and 81,259.20

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Solution

The fourth proportional to 133,941.60, 200,620.80 and 81,259.20 is: 121,711.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,941.60 : 200,620.80 = 81,259.20 : x
  2. Step 2: Convert to fraction form
    133,941.60/200,620.80 = 81,259.20/x
  3. Step 3: Cross multiply
    133,941.60x = 200,620.80 × 81,259.20
  4. Step 4: Simplify right side
    133,941.60x = 16,302,285,711.36
  5. Step 5: Solve for x
    x = 16,302,285,711.36/133,941.60
  6. Step 6: Final answer
    x = 121,711.89

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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.