Home / 80,409.05-111,472.72-76,143.20

Finding the Fourth Proportional to 80,409.05, 111,472.72 and 76,143.20

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Solution

The fourth proportional to 80,409.05, 111,472.72 and 76,143.20 is: 105,558.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,409.05 : 111,472.72 = 76,143.20 : x
  2. Step 2: Convert to fraction form
    80,409.05/111,472.72 = 76,143.20/x
  3. Step 3: Cross multiply
    80,409.05x = 111,472.72 × 76,143.20
  4. Step 4: Simplify right side
    80,409.05x = 8,487,889,613.50
  5. Step 5: Solve for x
    x = 8,487,889,613.50/80,409.05
  6. Step 6: Final answer
    x = 105,558.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.