Home / 120,421.53-166,191.12-66,711.69

Finding the Fourth Proportional to 120,421.53, 166,191.12 and 66,711.69

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Solution

The fourth proportional to 120,421.53, 166,191.12 and 66,711.69 is: 92,067.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,421.53 : 166,191.12 = 66,711.69 : x
  2. Step 2: Convert to fraction form
    120,421.53/166,191.12 = 66,711.69/x
  3. Step 3: Cross multiply
    120,421.53x = 166,191.12 × 66,711.69
  4. Step 4: Simplify right side
    120,421.53x = 11,086,890,478.19
  5. Step 5: Solve for x
    x = 11,086,890,478.19/120,421.53
  6. Step 6: Final answer
    x = 92,067.34

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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.