Home / 120,814.30-180,888.27-91,142.38

Finding the Fourth Proportional to 120,814.30, 180,888.27 and 91,142.38

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Solution

The fourth proportional to 120,814.30, 180,888.27 and 91,142.38 is: 136,462.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,814.30 : 180,888.27 = 91,142.38 : x
  2. Step 2: Convert to fraction form
    120,814.30/180,888.27 = 91,142.38/x
  3. Step 3: Cross multiply
    120,814.30x = 180,888.27 × 91,142.38
  4. Step 4: Simplify right side
    120,814.30x = 16,486,587,441.88
  5. Step 5: Solve for x
    x = 16,486,587,441.88/120,814.30
  6. Step 6: Final answer
    x = 136,462.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.