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Finding the Fourth Proportional to 119,843.55, 165,380.13 and 66,128.60

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Solution

The fourth proportional to 119,843.55, 165,380.13 and 66,128.60 is: 91,255.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,843.55 : 165,380.13 = 66,128.60 : x
  2. Step 2: Convert to fraction form
    119,843.55/165,380.13 = 66,128.60/x
  3. Step 3: Cross multiply
    119,843.55x = 165,380.13 × 66,128.60
  4. Step 4: Simplify right side
    119,843.55x = 10,936,356,878.17
  5. Step 5: Solve for x
    x = 10,936,356,878.17/119,843.55
  6. Step 6: Final answer
    x = 91,255.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.