Home / 72,722.40-109,083.20-20,131.52

Finding the Fourth Proportional to 72,722.40, 109,083.20 and 20,131.52

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Solution

The fourth proportional to 72,722.40, 109,083.20 and 20,131.52 is: 30,197.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,722.40 : 109,083.20 = 20,131.52 : x
  2. Step 2: Convert to fraction form
    72,722.40/109,083.20 = 20,131.52/x
  3. Step 3: Cross multiply
    72,722.40x = 109,083.20 × 20,131.52
  4. Step 4: Simplify right side
    72,722.40x = 2,196,010,622.46
  5. Step 5: Solve for x
    x = 2,196,010,622.46/72,722.40
  6. Step 6: Final answer
    x = 30,197.17

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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.