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Finding the Fourth Proportional to 120,701.75, 166,567.19 and 66,987.20

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Solution

The fourth proportional to 120,701.75, 166,567.19 and 66,987.20 is: 92,441.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,701.75 : 166,567.19 = 66,987.20 : x
  2. Step 2: Convert to fraction form
    120,701.75/166,567.19 = 66,987.20/x
  3. Step 3: Cross multiply
    120,701.75x = 166,567.19 × 66,987.20
  4. Step 4: Simplify right side
    120,701.75x = 11,157,869,751.45
  5. Step 5: Solve for x
    x = 11,157,869,751.45/120,701.75
  6. Step 6: Final answer
    x = 92,441.66

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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.