Home / 72,859.05-109,279.40-20,272.59

Finding the Fourth Proportional to 72,859.05, 109,279.40 and 20,272.59

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Solution

The fourth proportional to 72,859.05, 109,279.40 and 20,272.59 is: 30,406.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,859.05 : 109,279.40 = 20,272.59 : x
  2. Step 2: Convert to fraction form
    72,859.05/109,279.40 = 20,272.59/x
  3. Step 3: Cross multiply
    72,859.05x = 109,279.40 × 20,272.59
  4. Step 4: Simplify right side
    72,859.05x = 2,215,376,370.28
  5. Step 5: Solve for x
    x = 2,215,376,370.28/72,859.05
  6. Step 6: Final answer
    x = 30,406.33

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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.