Home / 72,780.96-109,159.24-20,195.76

Finding the Fourth Proportional to 72,780.96, 109,159.24 and 20,195.76

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Solution

The fourth proportional to 72,780.96, 109,159.24 and 20,195.76 is: 30,290.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,780.96 : 109,159.24 = 20,195.76 : x
  2. Step 2: Convert to fraction form
    72,780.96/109,159.24 = 20,195.76/x
  3. Step 3: Cross multiply
    72,780.96x = 109,159.24 × 20,195.76
  4. Step 4: Simplify right side
    72,780.96x = 2,204,553,812.82
  5. Step 5: Solve for x
    x = 2,204,553,812.82/72,780.96
  6. Step 6: Final answer
    x = 30,290.25

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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.