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Finding the Fourth Proportional to 133,687.60, 200,531.40 and 83,921.20

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Solution

The fourth proportional to 133,687.60, 200,531.40 and 83,921.20 is: 125,881.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,687.60 : 200,531.40 = 83,921.20 : x
  2. Step 2: Convert to fraction form
    133,687.60/200,531.40 = 83,921.20/x
  3. Step 3: Cross multiply
    133,687.60x = 200,531.40 × 83,921.20
  4. Step 4: Simplify right side
    133,687.60x = 16,828,835,725.68
  5. Step 5: Solve for x
    x = 16,828,835,725.68/133,687.60
  6. Step 6: Final answer
    x = 125,881.80

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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.