Home / 71,821.72-107,738.34-19,230.76

Finding the Fourth Proportional to 71,821.72, 107,738.34 and 19,230.76

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Solution

The fourth proportional to 71,821.72, 107,738.34 and 19,230.76 is: 28,847.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,821.72 : 107,738.34 = 19,230.76 : x
  2. Step 2: Convert to fraction form
    71,821.72/107,738.34 = 19,230.76/x
  3. Step 3: Cross multiply
    71,821.72x = 107,738.34 × 19,230.76
  4. Step 4: Simplify right side
    71,821.72x = 2,071,890,159.34
  5. Step 5: Solve for x
    x = 2,071,890,159.34/71,821.72
  6. Step 6: Final answer
    x = 28,847.68

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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.