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Finding the Fourth Proportional to 72,139.12, 108,220.31 and 22,219.20

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Solution

The fourth proportional to 72,139.12, 108,220.31 and 22,219.20 is: 33,332.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,139.12 : 108,220.31 = 22,219.20 : x
  2. Step 2: Convert to fraction form
    72,139.12/108,220.31 = 22,219.20/x
  3. Step 3: Cross multiply
    72,139.12x = 108,220.31 × 22,219.20
  4. Step 4: Simplify right side
    72,139.12x = 2,404,568,361.67
  5. Step 5: Solve for x
    x = 2,404,568,361.67/72,139.12
  6. Step 6: Final answer
    x = 33,332.38

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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.