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Finding the Fourth Proportional to 120,042.72, 165,658.32 and 66,331.44

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Solution

The fourth proportional to 120,042.72, 165,658.32 and 66,331.44 is: 91,537.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,042.72 : 165,658.32 = 66,331.44 : x
  2. Step 2: Convert to fraction form
    120,042.72/165,658.32 = 66,331.44/x
  3. Step 3: Cross multiply
    120,042.72x = 165,658.32 × 66,331.44
  4. Step 4: Simplify right side
    120,042.72x = 10,988,354,913.58
  5. Step 5: Solve for x
    x = 10,988,354,913.58/120,042.72
  6. Step 6: Final answer
    x = 91,537.04

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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.