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Finding the Fourth Proportional to 133,511.09, 200,128.19 and 83,476.31

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Solution

The fourth proportional to 133,511.09, 200,128.19 and 83,476.31 is: 125,127.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,511.09 : 200,128.19 = 83,476.31 : x
  2. Step 2: Convert to fraction form
    133,511.09/200,128.19 = 83,476.31/x
  3. Step 3: Cross multiply
    133,511.09x = 200,128.19 × 83,476.31
  4. Step 4: Simplify right side
    133,511.09x = 16,705,961,410.16
  5. Step 5: Solve for x
    x = 16,705,961,410.16/133,511.09
  6. Step 6: Final answer
    x = 125,127.90

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1.5x scale

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.