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Finding the Fourth Proportional to 80,620.65, 111,002.40 and 73,147.32

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Solution

The fourth proportional to 80,620.65, 111,002.40 and 73,147.32 is: 100,712.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,620.65 : 111,002.40 = 73,147.32 : x
  2. Step 2: Convert to fraction form
    80,620.65/111,002.40 = 73,147.32/x
  3. Step 3: Cross multiply
    80,620.65x = 111,002.40 × 73,147.32
  4. Step 4: Simplify right side
    80,620.65x = 8,119,528,073.57
  5. Step 5: Solve for x
    x = 8,119,528,073.57/80,620.65
  6. Step 6: Final answer
    x = 100,712.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.