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Finding the Fourth Proportional to 120,062.85, 165,690.12 and 66,351.34

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Solution

The fourth proportional to 120,062.85, 165,690.12 and 66,351.34 is: 91,566.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,062.85 : 165,690.12 = 66,351.34 : x
  2. Step 2: Convert to fraction form
    120,062.85/165,690.12 = 66,351.34/x
  3. Step 3: Cross multiply
    120,062.85x = 165,690.12 × 66,351.34
  4. Step 4: Simplify right side
    120,062.85x = 10,993,761,486.76
  5. Step 5: Solve for x
    x = 10,993,761,486.76/120,062.85
  6. Step 6: Final answer
    x = 91,566.72

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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.