Home / 109,021.80-150,451.44-66,000.72

Finding the Fourth Proportional to 109,021.80, 150,451.44 and 66,000.72

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Solution

The fourth proportional to 109,021.80, 150,451.44 and 66,000.72 is: 91,081.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,021.80 : 150,451.44 = 66,000.72 : x
  2. Step 2: Convert to fraction form
    109,021.80/150,451.44 = 66,000.72/x
  3. Step 3: Cross multiply
    109,021.80x = 150,451.44 × 66,000.72
  4. Step 4: Simplify right side
    109,021.80x = 9,929,903,365.04
  5. Step 5: Solve for x
    x = 9,929,903,365.04/109,021.80
  6. Step 6: Final answer
    x = 91,081.81

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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.