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Finding the Fourth Proportional to 120,091.78, 165,725.04 and 66,377.74

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Solution

The fourth proportional to 120,091.78, 165,725.04 and 66,377.74 is: 91,600.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,091.78 : 165,725.04 = 66,377.74 : x
  2. Step 2: Convert to fraction form
    120,091.78/165,725.04 = 66,377.74/x
  3. Step 3: Cross multiply
    120,091.78x = 165,725.04 × 66,377.74
  4. Step 4: Simplify right side
    120,091.78x = 11,000,453,616.61
  5. Step 5: Solve for x
    x = 11,000,453,616.61/120,091.78
  6. Step 6: Final answer
    x = 91,600.39

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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.