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Finding the Fourth Proportional to 133,999.60, 200,762.88 and 81,302.08

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Solution

The fourth proportional to 133,999.60, 200,762.88 and 81,302.08 is: 121,809.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,999.60 : 200,762.88 = 81,302.08 : x
  2. Step 2: Convert to fraction form
    133,999.60/200,762.88 = 81,302.08/x
  3. Step 3: Cross multiply
    133,999.60x = 200,762.88 × 81,302.08
  4. Step 4: Simplify right side
    133,999.60x = 16,322,439,730.79
  5. Step 5: Solve for x
    x = 16,322,439,730.79/133,999.60
  6. Step 6: Final answer
    x = 121,809.62

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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.